DP Chemistry Questionbank

• Syllabus

Topic 1: Stoichiometric relationships

Sub sections and their related questions

1.1 Introduction to the particulate nature of matter and chemical change

• 15M.1.hl.TZ2.2: Which expression gives the sum of all the coefficients for the general equation for the...
• 15M.1.sl.TZ2.3: What is the sum of all coefficients for the combustion of one mole of propane? ___...
• 14M.1.sl.TZ2.4: Some sodium chloride is dissolved in water. Which term describes the role of sodium chloride in...
• 13N.1.hl.TZ0.2: What are the coefficients of...
• 13N.2.hl.TZ0.5a: Methanol reacts with trinitramide to form nitrogen, carbon dioxide and water. Deduce the...
• 13N.1.sl.TZ0.3: What are the coefficients of...
• 13N.2.sl.TZ0.4a: Methanol reacts with trinitramide to form nitrogen, carbon dioxide and water. Deduce the...
• 13M.2.hl.TZ1.9a.iii: 2-bromobutane can be produced from but-2-ene. State the equation of this reaction using...
• 13M.1.sl.TZ1.3: What is the whole number ratio of the coefficients of ammonia to oxygen when the following...
• 13M.2.sl.TZ1.3a: Compare how electric current passes through sodium and sodium chloride by completing the table...
• 13M.2.sl.TZ1.8a.iii: Bromoethane can be produced either from ethene or from ethane. State an equation for each reaction.
• 13M.2.sl.TZ1.8b.i: State the equation for the reaction of...
• 13M.2.hl.TZ2.7c.iii: Deduce a balanced chemical equation, including state symbols, for the overall reaction which will...
• 13M.2.hl.TZ2.7e.v: Deduce the overall cell reaction, including state symbols.
• 13M.2.sl.TZ2.1f.i: One titration was abandoned because a brown precipitate, manganese(IV) oxide, formed. State the...
• 13M.2.sl.TZ2.6b.iii: State the balanced chemical equation for the reaction of potassium bromide, KBr(aq), with...
• 12N.2.hl.TZ0.6f.i: Deduce the overall equation for the reaction.
• 09N.1.hl.TZ0.1: Which coefficients would balance this equation? __ \({\text{Mn}}{{\text{O}}_2} + \) __...
• 09M.1.sl.TZ1.3: What is the coefficient for \({{\text{O}}_{\text{2}}}{\text{(g)}}\) when the equation for the...
• 11M.1.sl.TZ1.1: What is the sum of all coefficients when the following equation is balanced using the smallest...
• 11M.1.sl.TZ2.2: What is the sum of the coefficients for the equation when balanced using the smallest possible...
• 12M.1.sl.TZ2.2: Nitroglycerine, \({{\text{C}}_3}{{\text{H}}_5}{{\text{N}}_3}{{\text{O}}_{\text{9}}}\), can be...
• 12M.1.sl.TZ2.5: Which statements about solutions are correct? I.     A solute dissolves in a solvent to form a...
• 12M.2.sl.TZ2.2a: State the equation for the reaction between magnesium and hydrochloric acid.
• 11N.1.sl.TZ0.2: What is the sum of the coefficients when the following equation is balanced using whole...
• 16M.3.sl.TZ0.3a: State the overall redox equation when carbon monoxide reduces Fe2O3 to Fe.
• 16M.1.sl.TZ0.1: Which equation represents sublimation?   A. 2Al(s)+3I2(g)→2AlI3(s)B. HgCl2(s)→HgCl2(g)C....
• 16M.2.sl.TZ0.1b: Phosphine is usually prepared by heating white phosphorus, one of the allotropes of phosphorus,...
• 16M.2.sl.TZ0.2b: (i) State the equation for the reaction of this oxide of phosphorus with water. (ii) Predict how...
• 16M.2.hl.TZ0.1b: Phosphine is usually prepared by heating white phosphorus, one of the allotropes of phosphorus,...
• 16M.2.hl.TZ0.1d: Impurities cause phosphine to ignite spontaneously in air to form an oxide of phosphorus and...
• 16N.2.sl.TZ0.3a: Identify the formula and state symbol of X.
• 16N.2.sl.TZ0.4c: Magnesium burns in air to form a white compound, magnesium oxide. Formulate an equation for the...
• 16N.2.sl.TZ0.4g: Magnesium chloride can be electrolysed. Deduce the half-equations for the reactions at each...
• 16N.2.hl.TZ0.4i: Magnesium chloride can be electrolysed. (i) Deduce the half-equations for the reactions at each...
• 17M.1.sl.TZ1.2: Which statements about mixtures are...
• 17M.2.sl.TZ1.2f.i: Formulate an equation for this reaction.
• 17M.2.sl.TZ1.3b: Formulate an equation for the reaction between VO2+(aq) and V2+(aq) in acidic solution to form...
• 17M.2.hl.TZ1.3c.i: Formulate an equation for the reaction between VO2+(aq) and V2+(aq) in acidic solution to form...
• 17M.1.sl.TZ2.1: What is the sum of the coefficients when the equation is balanced with whole numbers? —C8H18(g)...
• 17N.1.sl.TZ0.4: What is the sum of the coefficients when the following equation is balanced using the...
• 18M.2.hl.TZ1.1f: The combustion of urea produces water, carbon dioxide and nitrogen. Formulate a balanced...
• 18M.2.hl.TZ2.1g: Outline why repeating quantitative measurements is important.
• 18M.1.sl.TZ1.1: Which is a homogeneous mixture? A.     Oil and water B.     Sand and water C.     Ethanol and...
• 18M.2.sl.TZ1.1f: The combustion of urea produces water, carbon dioxide and nitrogen. Formulate a balanced...
• 18M.3.sl.TZ1.2a: Annotate the balanced equation below with state symbols. CaCO3(__) + 2HCl(__) → CaCl2(__) +...
• 18M.1.sl.TZ2.1: What is the sum of the coefficients when the equation is balanced with the lowest whole number...
• 18M.2.sl.TZ2.1b: Formulate the equation for the reaction of H2SO4 with Mg(OH)2.

1.2 The mole concept

• 15M.1.sl.TZ1.2: Which sample contains the largest amount, in mol, of oxygen atoms? A.     0.20 mol...
• 15M.1.sl.TZ1.3: Which compound has the highest percentage of carbon by mass? A.    ...
• 15M.1.sl.TZ2.1: What is the total number of protons and electrons in one mole of hydrogen gas? A.     2 B.    ...
• 15M.1.sl.TZ2.2: A hydrocarbon contains 85.7 % carbon by mass. What is the empirical formula of the...
• 15M.2.sl.TZ1.7a: A hydrocarbon has the empirical formula \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{7}}}\). When...
• 14M.2.hl.TZ1.3b: Calculate, showing your working, the relative atomic mass, \({A_{\text{r}}}\), of magnesium,...
• 14M.2.hl.TZ2.1a: The density of ethanoic acid is \({\text{1.05 g}}\,{\text{c}}{{\text{m}}^{ - 3}}\). Determine the...
• 14M.3.hl.TZ1.2a: Show that the empirical formula of compound X is...
• 14M.1.sl.TZ1.2: The structural formula of a dioxin is shown below. What is its empirical formula? A.    ...
• 14M.1.sl.TZ2.1: What is the mass, in g, of one mole of hydrated copper(II) sulfate,...
• 14M.1.sl.TZ2.3: For which compounds is the empirical formula the same as the molecular formula? I.   ...
• 14M.2.sl.TZ1.2b: (i)     Define the term relative atomic mass.     (ii)     Calculate, showing your working,...
• 14N.2.sl.TZ0.4b: Deduce the empirical formula of D-fructose.
• 14N.2.sl.TZ0.4c: Calculate the percentage composition by mass of D-fructose.
• 13N.1.sl.TZ0.2: Which represents an empirical formula? A.    ...
• 13M.2.hl.TZ1.1d: Determine the molecular formula of HA.
• 13M.1.sl.TZ1.1: Which statements are correct about Avogadro’s constant? I.     It is the number of ions in 12 g...
• 13M.1.sl.TZ1.2: What is the molar mass, in \({\text{g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\), of a substance if 0.30...
• 13M.2.sl.TZ1.1b: This known mass of acid, HA, was then dissolved in distilled water to form a...
• 13M.2.sl.TZ1.1c: The percentage composition of HA is 70.56% carbon, 23.50% oxygen and 5.94% hydrogen. Determine...
• 13M.2.hl.TZ2.8e.i: When a \(6.234 \times {10^{ - 2}}{\text{ g}}\) of the compound was combusted,...
• 13M.2.hl.TZ2.8e.ii: Menthol occurs naturally and has several isomers. State the structural feature of menthol which...
• 13M.1.sl.TZ2.1: Which contains the largest number of ions? A.     1 mol...
• 13M.1.sl.TZ2.3: Which is the best description of relative atomic mass, Ar? A.     The number of neutrons and...
• 13M.2.sl.TZ2.7d.i: Determine its empirical formula.
• 13M.2.sl.TZ2.7d.ii: Determine its molecular formula given that its molar mass is...
• 12N.2.hl.TZ0.7b.i: Determine the empirical formula of the ester, showing your working.
• 12N.2.hl.TZ0.7b.ii: The molar mass of the ester is \({\text{116.18 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\). Determine...
• 12N.1.sl.TZ0.1: What is the number of ions in 0.20 mol of...
• 12N.1.sl.TZ0.2: What is the molar mass, in \({\text{g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\), of washing soda...
• 12N.2.sl.TZ0.6b.ii: Determine the empirical formula of the ester, showing your working.
• 12N.2.sl.TZ0.6b.iii: The molar mass of the ester is \({\text{116.18 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\). Determine...
• 10N.1.hl.TZ0.2: \({\text{300 c}}{{\text{m}}^{\text{3}}}\) of water is added to a solution of...
• 10N.1.sl.TZ0.1: What is the total number of nitrogen atoms in two mol of...
• 10N.2.sl.TZ0.5a: The alkane contains 81.7% by mass of carbon. Determine its empirical formula, showing your working.
• 10N.2.sl.TZ0.5b: Equal volumes of carbon dioxide and the unknown alkane are found to have the same mass, measured...
• 09N.1.sl.TZ0.1: Which non-metal forms an oxide XO2 with a relative molecular mass of 60? A.     C B.     N C. ...
• 09N.1.sl.TZ0.3: 4.00 mol of a hydrocarbon with an empirical formula of \({\text{C}}{{\text{H}}_{\text{2}}}\) has...
• 10M.1.sl.TZ2.1: What is the coefficient of \({\rm{F}}{{\rm{e}}_3}{{\rm{O}}_4}\) when the following equation is...
• 10M.1.sl.TZ2.3: Which molecular formula is also an empirical formula? A.    ...
• 10M.1.sl.TZ2.4: Which of the following is consistent with Avogadro’s law? A.     \(\frac{P}{T} = \) constant...
• 09M.2.hl.TZ1.7c.ii: Give the formulas of all the ions present in the solution.
• 09M.1.sl.TZ1.1: The molar mass of a compound is approximately \({\text{56 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\)....
• 09M.1.sl.TZ1.2: Which compound has the empirical formula with the largest mass? A.    ...
• 09M.3.sl.TZ1.E2c.iii: 0.0002 moles of \({{\text{I}}^ - }\) were formed in step 3. Calculate the amount, in moles, of...
• 09M.2.sl.TZ2.3: Smog is common in cities throughout the world. One component of smog is PAN (peroxyacylnitrate)...
• 11M.2.hl.TZ1.3a: Explain why the relative atomic mass of cobalt is greater than the relative atomic mass of...
• 11M.1.sl.TZ1.3: How many molecules are present in a drop of ethanol,...
• 11M.1.sl.TZ1.4: Which sample has the greatest mass? A.     1 mol of \({\text{S}}{{\text{O}}_{\text{2}}}\) B.  ...
• 11M.1.sl.TZ1.5: The relative molecular mass of a gas is 56 and its empirical formula is...
• 11M.2.sl.TZ1.2a: Explain why the relative atomic mass of argon is greater than the relative atomic mass of...
• 12M.1.sl.TZ2.1: What is the total number of atoms in 0.100 mol of...
• 12M.2.sl.TZ2.5a: (i)     Distinguish between the terms empirical formula and molecular formula. Empirical...
• 11N.2.sl.TZ0.7d.iii: The molar mass was determined to be \({\text{131.38 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\). Deduce...
• 16M.1.sl.TZ0.2: For which compound is the empirical formula the same as the molecular...
• 16M.2.sl.TZ0.2a: (i) 200.0 g of air was heated by the energy from the complete combustion of 1.00 mol phosphine....
• 16M.2.hl.TZ0.1d: Impurities cause phosphine to ignite spontaneously in air to form an oxide of phosphorus and...
• 16N.3.sl.TZ0.2a: State and explain the further work students need to carry out in trial 2 before they can process...
• 16N.3.sl.TZ0.2c: List two assumptions made in this experiment.
• 16N.3.sl.TZ0.18b: Suggest why isolation of the crude product involved the addition of ice-cold water.
• 17M.1.sl.TZ1.1: Which compound has the greatest percentage by mass of nitrogen atoms? A.     N2H4 B.    ...
• 17M.2.sl.TZ1.5c.i: One possible product, X, of the reaction of ethane with chlorine has the following composition by...
• 17M.2.hl.TZ1.6c.i: One possible product, X, of the reaction of ethane with chlorine has the following composition by...
• 17M.3.hl.TZ1.15d: The sequence of nitrogenous bases in DNA determines hereditary characteristics. Calculate the...
• 17M.1.sl.TZ2.2: How many moles of oxygen atoms are there in 0.500 mol of hydrated iron(II) ammonium...
• 17M.2.sl.TZ2.1a.i: After heating 3.760 g of a silver oxide 3.275 g of silver remained. Determine the empirical...
• 17M.2.sl.TZ2.7b.ii: Calculate the molar mass of the acid.
• 17N.1.sl.TZ0.1: How many atoms of nitrogen are there in 0.50 mol of (NH4)2CO3? A. 1 B. 2 C. 3.01 × 1023 D....
• 17N.1.sl.TZ0.2: What is the value of x when 32.2 g of Na2SO4•xH2O are heated leaving 14.2 g of anhydrous Na2SO4?...
• 17N.1.sl.TZ0.3: How many grams of sodium azide, NaN3, are needed to produce 68.1 dm3 of N2 (g) at STP? Molar...
• 17N.1.hl.TZ0.2: Which solution neutralizes 50.0 cm3 of 0.120 mol dm–3 NaOH (aq)? A. 12.5 cm3 of 0.080 mol dm–3...
• 17N.1.hl.TZ0.4: A compound with Mr = 102 contains 58.8 % carbon, 9.80 % hydrogen and 31 % oxygen by mass.What is...
• 17N.2.sl.TZ0.1d.ii: Calculate the enthalpy change, ΔH, in kJ mol–1, for the reaction between ethanoic acid and sodium...
• 17N.2.sl.TZ0.4a: Complete combustion of 0.1595 g of menthol produces 0.4490 g of carbon dioxide and 0.1840 g of...
• 17N.2.hl.TZ0.2d.i: Complete combustion of 0.1595 g of menthol produces 0.4490 g of carbon dioxide and 0.1840 g of...
• 17N.2.hl.TZ0.2d.iii: Determine the molecular formula of menthol using your answers from parts (d)(i) and (ii).
• 17N.3.sl.TZ0.3c: Calculate the percentage of water by mass in the NaCl•2H2O crystals. Use the data from section 6...
• 17N.3.sl.TZ0.8a.i: Determine the empirical formula of linoleic acid.
• 18M.2.hl.TZ1.1a.i: Calculate the percentage by mass of nitrogen in urea to two decimal places using section 6 of the...
• 18M.1.sl.TZ1.2: What is the molecular formula of a hydrocarbon containing 84.6% carbon by mass with a molar mass...
• 18M.2.sl.TZ1.1a.i: Calculate the percentage by mass of nitrogen in urea to two decimal places using section 6 of the...
• 18M.3.sl.TZ1.1b.ii: The solution of palmitic acid had a concentration of 0.0034 mol dm−3. Calculate the number of...
• 18M.3.sl.TZ1.1b.iii: Assuming the sudden change in gradient occurs at 240 cm2, calculate the area, in cm2, that a...
• 18M.1.sl.TZ2.2: What is the number of atoms of oxygen in 2.0 mol of hydrated sodium carbonate, Na2CO3•10H2O?...
• 18M.2.sl.TZ2.1e: Determine the mass of Mg(OH)2 in the antacid tablet.

1.3 Reacting masses and volumes

• 15M.1.hl.TZ1.1: 4.0 g of solid sodium hydroxide is added to \({\text{0.10 d}}{{\text{m}}^{\text{3}}}\) of...
• 15M.2.hl.TZ1.1a: Calculate the average volume of NaOH added, in \({\text{c}}{{\text{m}}^{\text{3}}}\), in...
• 15M.2.hl.TZ1.1b.i: The equation for the reaction taking place in the titration...
• 15M.2.hl.TZ1.1b.ii: Determine the amount, in mol, of ethanedioic acid present in...
• 15M.2.hl.TZ1.1b.iii: Determine the molar mass of hydrated ethanedioic acid.
• 15M.2.hl.TZ1.1b.iv: Determine the value of x in the formula...
• 15M.1.sl.TZ1.1: Combustion of ethanol takes place according to the following unbalanced equation. ___...
• 15M.1.sl.TZ1.4: Which solution contains the biggest amount, in mol, of chloride ions? A.    ...
• 15M.1.sl.TZ2.4: A gas with a molar mass (\(M\)) of \({\text{44 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\) occupies a...
• 15M.2.sl.TZ1.1b: Calculate the average volume of NaOH added, in \({\text{c}}{{\text{m}}^{\text{3}}}\), in...
• 15M.2.sl.TZ1.1c: (i)     The equation for the reaction taking place in the titration...
• 15M.2.sl.TZ1.5a: (i)     State an equation for the formation of ethanol from ethene and the necessary reaction...
• 15M.2.sl.TZ1.7a: A hydrocarbon has the empirical formula \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{7}}}\). When...
• 15M.2.sl.TZ2.1a.ii: Determine the concentration of the hydrochloric acid, including units.
• 15M.2.sl.TZ2.6b.v: Potassium also reacts with water to form hydrogen gas. Determine the volume, in...
• 14M.1.hl.TZ1.2: Under which conditions does \({\text{C}}{{\text{H}}_{\text{4}}}\) have the same number of...
• 14M.2.hl.TZ1.1a: (i)     Calculate the amount, in mol, of anhydrous magnesium sulfate.     (ii)     Calculate...
• 14M.2.hl.TZ1.8b: (i)     State an equation for the reaction of ethanoic acid with a solution of sodium...
• 14M.2.hl.TZ1.8c: (i)     Determine the amount, in mol, of X in the gas syringe.             (ii)    ...
• 14M.2.hl.TZ2.1c.ii: Suggest the average volume of alkali, required to neutralize the...
• 14M.2.hl.TZ2.6e.i: Calculate the volume of sulfur dioxide, in \({\text{c}}{{\text{m}}^{\text{3}}}\), that the...
• 14M.1.sl.TZ1.3: \({\text{100.0 c}}{{\text{m}}^{\text{3}}}\) of a...
• 14M.1.sl.TZ1.4: Which volumes of gases at standard temperature and pressure have the same mass as...
• 14M.2.sl.TZ1.1b: (i)     Calculate the amount, in mol, of anhydrous magnesium sulfate.     (ii) Calculate the...
• 14M.2.sl.TZ1.7b: (i)     State an equation for the reaction of ethanoic acid with a solution of sodium...
• 14M.2.sl.TZ1.7c: (i)     Determine the amount, in mol, of X in the gas syringe.             (ii)    ...
• 14M.2.sl.TZ2.1d: (i)     Calculate the absolute uncertainty of the titre for Titration 1...
• 14M.2.sl.TZ2.1e: Referring back to your answer for part (a), calculate the percentage of ethanoic acid converted...
• 14M.2.sl.TZ2.5a: The teacher made up \({\text{2.50 d}}{{\text{m}}^{\text{3}}}\) of the sodium thiosulfate solution...
• 14M.2.sl.TZ2.5e: (i)     Calculate the volume of sulfur dioxide, in \({\text{c}}{{\text{m}}^{\text{3}}}\), that...
• 14N.1.hl.TZ0.3: At which temperature, in K, assuming constant pressure, is the volume of a fixed mass of gas at...
• 14N.2.hl.TZ0.4a: A student added 5.00 g of \({{\text{P}}_{\text{4}}}{{\text{O}}_{{\text{10}}}}\) to 1.50 g of...
• 14N.2.hl.TZ0.4b: Calculate the mass of phosphoric(V) acid,...
• 14N.2.hl.TZ0.8e: (i)     Draw a best-fit curve for the data on the graph. (ii)     Use the data point labelled X...
• 14N.1.sl.TZ0.1: 0.040 mol of...
• 14N.1.sl.TZ0.2: When sodium bromate(V), \({\text{NaBr}}{{\text{O}}_{\text{3}}}\), is heated, it reacts according...
• 14N.1.sl.TZ0.3: Aluminium carbide reacts with water according to the equation below. What is the sum of all the...
• 14N.1.sl.TZ0.4: At which temperature, in K, assuming constant pressure, is the volume of a fixed mass of gas at...
• 14N.2.sl.TZ0.2b: Deduce the relationship between the pressure and volume of the sample of carbon dioxide gas.
• 14N.2.sl.TZ0.2c: Use the data point labelled X to determine the amount, in mol, of carbon dioxide gas in the sample.
• 14N.2.sl.TZ0.6d.i: A student added 5.00 g of \({{\text{P}}_{\text{4}}}{{\text{O}}_{{\text{10}}}}\) to 1.50 g of...
• 14N.2.sl.TZ0.6d.ii: Calculate the mass of phosphoric(V) acid,...
• 14N.2.sl.TZ0.6d.iii: State a balanced equation for the reaction of aqueous...
• 13N.1.hl.TZ0.3: 7.102 g of Na2SO4 (M = 142.04 g mol–1) is dissolved in water to prepare...
• 13N.2.hl.TZ0.1c: Explain why the solution suddenly changes colour.
• 13N.1.sl.TZ0.4: What is the pressure, in Pa, if 3 mol of gas occupies \({\text{500 c}}{{\text{m}}^{\text{3}}}\)...
• 13N.1.sl.TZ0.5: 7.102 g of...
• 13N.2.sl.TZ0.1a: Calculate the amount, in mol, of KI in the reaction mixture.
• 13N.2.sl.TZ0.1b: Calculate the amount, in mol, of \({{\text{H}}_{\text{2}}}{{\text{O}}_{\text{2}}}\) in the...
• 13N.2.sl.TZ0.1e: Explain why the solution suddenly changes colour.
• 13N.2.sl.TZ0.1g: Calculate the total uncertainty, in \({\text{c}}{{\text{m}}^{\text{3}}}\), of the volume of the...
• 13M.1.hl.TZ1.3: Which graph represents the relationship between volume and pressure for a fixed mass of gas at...
• 13M.1.sl.TZ1.4: When \({\text{50 c}}{{\text{m}}^{\text{3}}}\) of a hydrocarbon,...
• 13M.1.sl.TZ1.5: What is the pressure, in Pa, in a \({\text{100 c}}{{\text{m}}^{\text{3}}}\)container containing...
• 13M.2.sl.TZ1.1a: Calculate the mass of the acid and determine its absolute and percentage uncertainty.
• 13M.2.sl.TZ1.1b: This known mass of acid, HA, was then dissolved in distilled water to form a...
• 13M.1.sl.TZ2.4: What mass of carbon dioxide, CO2(g), in g, is produced when 5.0 g of calcium carbonate,...
• 13M.1.sl.TZ2.5: What volume of carbon dioxide, CO2(g), in dm3, is produced when 1 dm3 of octane, C8H18(g),...
• 13M.2.sl.TZ2.1e.i: Determine the amount, in mol, of \({\text{MnO}}_{\text{4}}^ - {\text{(aq)}}\), used in each...
• 13M.2.sl.TZ2.1e.ii: Calculate the amount, in mol, of \({\text{F}}{{\text{e}}^{2 + }}{\text{(aq)}}\) ions in...
• 13M.2.sl.TZ2.1e.iii: Determine the total mass of iron, in g, in the \({\text{250 c}}{{\text{m}}^{\text{3}}}\) solution.
• 13M.2.sl.TZ2.1e.iv: Determine the percentage by mass of iron in the tablets.
• 12N.1.sl.TZ0.3: The equation for the reduction of iron(III) oxide...
• 12N.1.sl.TZ0.4: \({\text{3.0 d}}{{\text{m}}^{\text{3}}}\) of ethyne,...
• 12N.2.sl.TZ0.1a: (i)     State the number of significant figures for the masses of...
• 12N.2.sl.TZ0.1c: (i)     Calculate the percentage of iodine by mass in...
• 10N.2.hl.TZ0.6d: (i)     Calculate the volume of the sodium hydroxide solution required to react exactly with a...
• 10N.2.hl.TZ0.5b: A 1.00 g gaseous sample of the alkane has a volume of 385 cm3 at standard temperature and...
• 10N.1.sl.TZ0.2: On analysis, a compound with molar mass \({\text{60 g}}\,{\text{mo}}{{\text{l}}^{ - 1}}\) was...
• 10N.1.sl.TZ0.3: Equal masses of the metals Na, Mg, Ca and Ag are added to separate samples of excess HCl (aq)....
• 10N.1.sl.TZ0.5: 8.5 g of \({\text{N}}{{\text{H}}_{\text{3}}}\) are dissolved in...
• 10N.2.sl.TZ0.6e: (i)     Calculate the volume of the sodium hydroxide solution required to react exactly with a...
• 09N.1.hl.TZ0.2: What volume of carbon dioxide, in dm\(^3\) under standard conditions, is formed when 7.00 g of...
• 09N.1.sl.TZ0.4: What will be the concentration of sulfate ions in \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\)...
• 09N.1.sl.TZ0.5: The volume of an ideal gas at 27.0 °C is increased from...
• 09N.1.sl.TZ0.16: In a reaction that occurs in 50 g of aqueous solution, the temperature of the reaction mixture...
• 09N.2.sl.TZ0.1d: Calculate the amount, in moles, of Fe present in the \(3.682 \times {10^{ - 1}}{\text{ g}}\)...
• 09N.2.sl.TZ0.1e: Determine the percentage by mass of Fe present in the \(3.682 \times {10^{ - 1}}{\text{ g}}\)...
• 09N.2.sl.TZ0.4b: Both \({{\text{C}}_{\text{5}}}{{\text{H}}_{{\text{12}}}}\) and...
• 10M.2.sl.TZ1.1: (a)     (i)     Deduce the change in the oxidation numbers of copper and nitrogen in step...
• 10M.1.sl.TZ2.2: What is the mass, in g, of one molecule of ethane,...
• 10M.1.sl.TZ2.5: A sample of element X contains 69% of 63X and 31% of 65X. What is the relative atomic mass of X...
• 10M.2.sl.TZ2.1: (a)     A student added \({\text{27.20 c}}{{\text{m}}^{\text{3}}}\) of...
• 09M.2.hl.TZ1.4b.i: Calculate the amount, in moles, of \({\text{MnO}}_4^ - \) ions present in...
• 09M.2.hl.TZ1.4b.ii: Calculate the amount, in moles, of \({\text{F}}{{\text{e}}^{2 + }}\) ions present in the vitamin...
• 09M.2.hl.TZ1.4b.iii: Determine the percentage by mass of \({\text{F}}{{\text{e}}^{2 + }}\) ions present in the vitamin...
• 09M.1.sl.TZ1.4: What is the maximum mass, in g, of magnesium oxide that can be obtained from the reaction of...
• 09M.1.sl.TZ1.5: \({\text{5 d}}{{\text{m}}^{\text{3}}}\) of carbon monoxide, CO(g), and...
• 09M.2.sl.TZ1.1b: For part of her extended essay investigation into the efficiency of the process, a student...
• 09M.2.sl.TZ1.1e: Calculate the percentage yield of biodiesel obtained in this process.
• 09M.1.sl.TZ2.3: What volume of sulfur trioxide, in cm3, can be prepared using...
• 09M.2.sl.TZ2.1b.i: Determine the amount, in mol, of salicylic acid,...
• 09M.2.sl.TZ2.1b.ii: Calculate the theoretical yield, in g, of aspirin,...
• 09M.2.sl.TZ2.1b.iii: Determine the percentage yield of pure aspirin.
• 11M.1.hl.TZ1.2: What mass, in g, of hydrogen is formed when 3 mol of aluminium react with excess hydrochloric...
• 11M.2.hl.TZ1.9e.iii: \({\text{30.0 d}}{{\text{m}}^{\text{3}}}\) of ammonia reacts with...
• 11M.1.sl.TZ1.2: 1.7 g of \({\rm{NaN}}{{\rm{O}}_3}({M_r} = 85)\) is dissolved in water to prepare...
• 11M.2.sl.TZ1.1b.i: Calculate the amount, in mol, of methanol burned.
• 11M.2.sl.TZ1.4a.i: Calculate the mass, in g, of ethanol and octane in 1.00 kg of the fuel mixture.
• 11M.2.hl.TZ2.2a.i: Calculate the percentage by mass of antimony in a sample of pure stibnite. State your answer to...
• 11M.2.hl.TZ2.3b.i: Explain precisely what the square brackets around nitrogen(II) oxide, [NO(g)], represent in this...
• 11M.2.hl.TZ2.3c.i: Explain what the square brackets around the copper containing species represent.
• 11M.1.sl.TZ2.3: Chloroethene, \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{3}}}{\text{Cl}}\), reacts with oxygen...
• 11M.1.sl.TZ2.4: A fixed mass of gas has a certain volume at a temperature of 50 °C. What temperature is required...
• 11M.1.sl.TZ2.5: What is the concentration of NaCl, in \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\), when...
• 11M.1.sl.TZ2.17: At 25 °C, \({\text{200 c}}{{\text{m}}^{\text{3}}}\) of...
• 11M.2.sl.TZ2.1a.i: Calculate the amount, in mol, of anhydrous copper(II) sulfate dissolved in the 50.0 g of water.
• 11M.2.sl.TZ2.1b.i: Calculate the amount, in mol, of water in 6.24 g of pentahydrated copper(II) sulfate.
• 12M.1.sl.TZ2.3: The volume occupied by one mole of an ideal gas at 273 K and \(1.01 \times {10^5}{\text{ Pa}}\)...
• 12M.1.sl.TZ2.4: What volume, in \({{\text{m}}^{\text{3}}}\), is occupied by 2.00 mol of gas at 27 °C and 2.00 atm...
• 12M.2.sl.TZ2.2b: Determine the limiting reactant.
• 12M.2.sl.TZ2.2c: (i)     in mol. (ii)     in \({\text{c}}{{\text{m}}^{\text{3}}}\), under the stated conditions...
• 12M.2.sl.TZ2.2d: The actual volume of hydrogen measured was lower than the calculated theoretical volume. Suggest...
• 11N.1.hl.TZ0.3: Four identical containers under the same conditions are filled with gases as shown below. Which...
• 11N.1.sl.TZ0.3: \({\text{1.0 d}}{{\text{m}}^{\text{3}}}\) of an ideal gas at 100 kPa and 25 °C is heated to 50 °C...
• 11N.1.sl.TZ0.4: What is the amount, in moles, of sulfate ions in \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of...
• 11N.2.sl.TZ0.1b.ii: Calculate the amount, in mol, of sodium azide present.
• 11N.2.sl.TZ0.1b.iii: Determine the volume of nitrogen gas, in \({\text{d}}{{\text{m}}^{\text{3}}}\), produced under...
• 11N.2.sl.TZ0.7d.i: Determine the percentage by mass of carbon and hydrogen in J, using the combustion data.
• 11N.2.sl.TZ0.7d.ii: Determine the percentage by mass of chlorine in J, using the precipitation data.
• 16M.3.sl.TZ0.2a: Outline, giving your reasons, how you would carefully prepare the 1.00dm3 aqueous solution from...
• 16M.3.sl.TZ0.2b: (i) State the colour change of the indicator that the student would see during his titration...
• 16M.3.sl.TZ0.2c: Suggest why, despite preparing the solution and performing the titrations very carefully, widely...
• 16M.1.sl.TZ0.3: In which mixture is NaOH the limiting reagent? A. 0.20mol NaOH + 0.10mol...
• 16M.1.sl.TZ0.4: Why do gases deviate from the ideal gas law at high pressures? A. Molecules have finite...
• 16M.3.sl.TZ0.18b: Determine the mass of HCl, in g, that can be neutralized by the standard adult dose of 1.00g...
• 16M.2.sl.TZ0.1c: 2.478 g of white phosphorus was used to make phosphine according to the equation: P4(s)...
• 16M.2.hl.TZ0.1c: 2.478 g of white phosphorus was used to make phosphine according to the equation: (i) Calculate...
• 16N.1.sl.TZ0.2: Which volume, in cm3, of 0.20 mol dm-3 NaOH (aq) is needed to neutralize 0.050 mol of...
• 16N.1.sl.TZ0.3: The complete combustion of 15.0cm3 of a gaseous hydrocarbon X produces 60.0 cm3 of carbon dioxide...
• 16N.1.sl.TZ0.4: 5.0mol of Fe2O3(s) and 6.0mol of CO(g) react according to the equation below. What is the...
• 16N.2.sl.TZ0.2c: 5.00 g of an impure sample of hydrated ethanedioic acid, (COOH)2•2H2O, was dissolved in water to...
• 16N.2.sl.TZ0.3c: The precipitate of sulfur makes the mixture cloudy, so a mark underneath the reaction mixture...
• 16N.2.hl.TZ0.2c: 5.00 g of an impure sample of hydrated ethanedioic acid, (COOH)2•2H2O, was dissolved in water to...
• 16N.3.sl.TZ0.18a: Determine the percentage experimental yield of the product after recrystallization. The molar...
• 17M.1.sl.TZ1.3: 5.0 cm3 of 2.00 mol\(\,\)dm–3 sodium carbonate solution, Na2CO3(aq), was added to a volumetric...
• 17M.1.sl.TZ1.4: What is the expression for the volume of hydrogen gas, in dm3, produced at STP when 0.30 g of...
• 17M.2.sl.TZ1.4h.i: Calculate, showing your working, the mass of hydrazine needed to remove all the dissolved oxygen...
• 17M.2.sl.TZ1.4h.ii: Calculate the volume, in dm3, of nitrogen formed under SATP conditions. (The volume of 1 mol of...
• 17M.3.sl.TZ1.3: Suggest how the end point of the titration might be estimated from the graph.
• 17M.3.sl.TZ1.4: State and explain how the graph would differ if 1 mol\(\,\)dm−3 sulfuric acid had been used...
• 17M.1.sl.TZ2.3: What is the maximum volume, in dm3, of CO2(g) produced when 1.00 g of CaCO3(s) reacts with 20.0...
• 17M.1.sl.TZ2.4: Which factors affect the molar volume of an ideal...
• 17M.2.sl.TZ2.2b.ii: The sample of K2Cr2O7(s) in (i) was dissolved in distilled water to form 0.100 dm3 solution....
• 17M.2.sl.TZ2.2b.iii: 10.0 cm3 of the waste sample required 13.24 cm3 of the K2Cr2O7 solution. Calculate the molar...
• 17M.2.sl.TZ2.7b.i: Calculate the amount, in mol, of NaOH(aq) used.
• 17M.2.sl.TZ2.7b.ii: Calculate the molar mass of the acid.
• 17M.3.sl.TZ2.2b.i: Explain why this experiment might give a low result for the molar mass of butane.
• 17M.3.sl.TZ2.2b.ii: Suggest one improvement to the investigation.
• 17M.3.sl.TZ2.15a.i: Calculate the amounts, in mol, of each reactant.
• 17M.3.sl.TZ2.15a.ii: Calculate, in g, the theoretical yield of aspirin.
• 17N.1.hl.TZ0.3: What is the pressure, in Pa, inside a 1.0 m3 cylinder containing 10 kg of H2 (g) at 25 ºC? R =...
• 17N.2.sl.TZ0.1c: Calculate the concentration of ethanoic acid, CH3COOH, in mol dm–3.
• 17N.2.sl.TZ0.4b: 0.150 g sample of menthol, when vaporized, had a volume of 0.0337 dm3 at 150 °C and 100.2 kPa....
• 17N.2.hl.TZ0.2d.ii: 0.150 g sample of menthol, when vaporized, had a volume of 0.0337 dm3 at 150 °C and 100.2 kPa....
• 18M.2.hl.TZ1.1c: Urea can be made by reacting potassium cyanate, KNCO, with ammonium chloride, NH4Cl. KNCO(aq) +...
• 18M.2.hl.TZ1.1g: Calculate the maximum volume of CO2, in cm3, produced at STP by the combustion of 0.600 g of...
• 18M.1.sl.TZ1.3: Which graph shows the relationship between the volume and pressure of a fixed mass of an ideal...
• 18M.1.sl.TZ1.4: What is the percentage yield when 7 g of ethene produces 6 g of ethanol? Mr(ethene) = 28 and...
• 18M.2.sl.TZ1.1c: Urea can be made by reacting potassium cyanate, KNCO, with ammonium chloride, NH4Cl.            ...
• 18M.1.sl.TZ2.3: What is the volume, in cm3, of the final solution if 100 cm3 of a solution containing 1.42 g of...
• 18M.1.sl.TZ2.4: What is the percentage yield when 2.0 g of ethene, C2H4, is formed from 5.0 g of ethanol, C2H5OH?...
• 18M.1.sl.TZ2.6: Which electron transition emits energy of the longest wavelength?
• 18M.2.sl.TZ2.1a: Calculate the amount, in mol, of H2SO4.
• 18M.2.sl.TZ2.1c: The excess sulfuric acid required 20.80 cm3 of 0.1133 mol dm−3 NaOH for...
• 18M.2.sl.TZ2.1d: Calculate the amount of H2SO4 that reacted with Mg(OH)2.
• 18M.2.sl.TZ2.1f: Calculate the percentage by mass of magnesium hydroxide in the 1.24 g antacid tablet to three...