DP Chemistry Questionbank
1.1 Introduction to the particulate nature of matter and chemical change
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[N/A]Directly related questions
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16N.2.sl.TZ0.4g:
Magnesium chloride can be electrolysed.
Deduce the half-equations for the reactions at each electrode when molten magnesium chloride is electrolysed, showing the state symbols of the products. The melting points of magnesium and magnesium chloride are 922 K and 987 K respectively.
Anode (positive electrode):
Cathode (negative electrode):
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16N.2.hl.TZ0.4i:
Magnesium chloride can be electrolysed.
(i) Deduce the half-equations for the reactions at each electrode when molten magnesium chloride is electrolysed, showing the state symbols of the products. The melting points of magnesium and magnesium chloride are 922K and 987K respectively.
(ii) Identify the type of reaction occurring at the cathode (negative electrode).
(iii) State the products when a very dilute aqueous solution of magnesium chloride is electrolysed.
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16N.2.sl.TZ0.3a:
Identify the formula and state symbol of X.
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16N.2.sl.TZ0.4c:
Magnesium burns in air to form a white compound, magnesium oxide. Formulate an equation for the reaction of magnesium oxide with water.
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17M.1.sl.TZ1.2:
Which statements about mixtures are correct?
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
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17M.2.sl.TZ1.3b:
Formulate an equation for the reaction between VO2+(aq) and V2+(aq) in acidic solution to form V3+(aq).
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17M.2.hl.TZ1.3c.i:
Formulate an equation for the reaction between VO2+(aq) and V2+(aq) in acidic solution to form V3+(aq).
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17M.2.sl.TZ1.2f.i:
Formulate an equation for this reaction.
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17M.1.sl.TZ2.1:
What is the sum of the coefficients when the equation is balanced with whole numbers?
—C8H18(g) + —O2(g) → —CO(g) + —H2O(l)
A. 26.5
B. 30
C. 53
D. 61
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20N.2.sl.TZ0.1d(iii):
Write the equation for the reaction of chloroethane with a dilute aqueous solution of sodium hydroxide.
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20N.2.hl.TZ0.5a:
Write a balanced equation for the reaction.
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20N.3.sl.TZ0.2f:
Comment on the magnitudes of random and systematic errors in this experiment using the answers in (e).
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17N.1.sl.TZ0.4:
What is the sum of the coefficients when the following equation is balanced using the smallest whole numbers?
__C6H12O6 (aq) → __C2H5OH (aq) + __CO2 (g)
A. 4
B. 5
C. 9
D. 10
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21M.1.sl.TZ1.4:
What is the coefficient of (aq) when the equation is balanced using the smallest possible whole numbers?
A. 1
B. 2
C. 3
D. 4
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21M.1.sl.TZ2.4:
What is the sum of the coefficients when the equation is balanced with whole numbers?
__Sn(OH)4 (aq) + __NaOH (aq) → __Na2SnO3 (aq) + __H2O (l)
A. 4
B. 5
C. 6
D. 7
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21M.2.sl.TZ1.1d(i):
Write the equation for this reaction.
- 21M.2.sl.TZ1.3a: Deduce the ratio of Fe2+:Fe3+ in Fe3O4.
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21M.2.sl.TZ1.4c(i):
Determine the overall equation for the production of methanol.
- 21M.2.hl.TZ1.3a: Deduce the ratio of Fe2+:Fe3+ in Fe3O4.
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21M.2.hl.TZ1.1e(i):
Write the equation for this reaction.
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21M.2.hl.TZ1.4c(i):
Determine the overall equation for the production of methanol.
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21M.2.sl.TZ2.1d(i):
Write the equation for the reaction of Ca(OH)2 (aq) with hydrochloric acid, HCl (aq).
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21M.2.hl.TZ2.1c(i):
Write the equation for the reaction of Ca(OH)2 (aq) with hydrochloric acid, HCl (aq).
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21M.2.hl.TZ2.5a(i):
Write the chemical equation for the complete combustion of ethanol.
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18M.2.hl.TZ2.1g:
Outline why repeating quantitative measurements is important.
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18M.2.hl.TZ1.1f:
The combustion of urea produces water, carbon dioxide and nitrogen.
Formulate a balanced equation for the reaction.
- 18M.1.sl.TZ1.1: Which is a homogeneous mixture? A. Oil and water B. Sand and water C. Ethanol and...
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18M.2.sl.TZ1.1f:
The combustion of urea produces water, carbon dioxide and nitrogen.
Formulate a balanced equation for the reaction.
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18M.3.sl.TZ1.2a:
Annotate the balanced equation below with state symbols.
CaCO3(__) + 2HCl(__) → CaCl2(__) + CO2(__) + H2O(__)
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18M.1.sl.TZ2.1:
What is the sum of the coefficients when the equation is balanced with the lowest whole number ratio?
__Na2S2O3(aq) + __HCl(aq) → __S(s) + __SO2(g) + __NaCl(aq) + __H2O(l)
A. 6
B. 7
C. 8
D. 9
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18M.2.sl.TZ2.1b:
Formulate the equation for the reaction of H2SO4 with Mg(OH)2.
- 21N.1.sl.TZ0.2: Which statement describes all homogeneous mixtures? A. Any sample has the same ratio of the...
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21N.2.sl.TZ0.3a(ii):
Write an equation for the reaction of white phosphorus (P4) with chlorine gas to form phosphorus trichloride (PCl3).
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21N.2.sl.TZ0.5a:
Formulate an equation for the reaction of one mole of phosphoric acid with one mole of sodium hydroxide.
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21N.2.hl.TZ0.3a(ii):
Write an equation for the reaction of white phosphorus (P4) with chlorine gas to form phosphorus trichloride (PCl3).
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21N.2.hl.TZ0.5a:
Formulate an equation for the reaction of one mole of phosphoric acid with one mole of sodium hydroxide.
- 18N.2.hl.TZ0.5a: State why this equilibrium reaction is considered homogeneous.
- 18N.2.sl.TZ0.5a: State why this equilibrium reaction is considered homogeneous.
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22M.1.sl.TZ2.4:
Which equation represents the deposition of iodine?
A. I2 (g) → I2 (l)
B. I2 (g) → I2 (s)
C. I2 (l) → I2 (g)
D. I2 (s) → I2 (g)
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22M.2.sl.TZ1.1a(i):
Write a balanced equation for the reaction that occurs.
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22M.2.sl.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.
__ Mg3N2 (s) + __ H2O (l) → __ Mg(OH)2 (s) + __ NH3 (aq)
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22M.2.hl.TZ1.1a(i):
Write a balanced equation for the reaction that occurs.
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22M.2.hl.TZ1.1d(i):
Calculate coefficients that balance the equation for the following reaction.
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22M.2.sl.TZ2.1a:
Determine the coefficients that balance the equation for the reaction of lithium with water.
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19M.2.hl.TZ1.2f(ii):
Formulate the equation for the complete combustion of benzoic acid in oxygen using only integer coefficients.
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19M.2.hl.TZ1.3j:
The reaction of sodium peroxide with excess water produces hydrogen peroxide and one other sodium compound. Suggest the formula of this compound.
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19M.3.hl.TZ1.1a:
Deduce, giving a reason, the group of elements in the periodic table most likely to undergo sublimation.
- 19M.1.hl.TZ1.1: Which diagram represents a heterogeneous mixture?
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19M.1.hl.TZ2.2:
What is the sum of the integer coefficients when propene undergoes complete combustion?
__C3H6 (g) + __O2 (g) → __CO2 (g) + __H2O (l)
A. 11
B. 17
C. 21
D. 23
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19M.2.sl.TZ1.2b(ii):
Formulate the equation for the complete combustion of benzoic acid in oxygen using only integer coefficients.
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19M.2.sl.TZ1.3d:
The reaction of sodium peroxide with excess water produces hydrogen peroxide and one other sodium compound. Suggest the formula of this compound.
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19M.3.sl.TZ1.1a:
Deduce, giving a reason, the group of elements in the periodic table most likely to undergo sublimation.
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19M.1.sl.TZ1.2:
What is the sum of the coefficients when the equation is balanced with the smallest whole numbers?
__BaCl2 (aq) + __Fe2(SO4)3 (aq) → __FeCl3 (aq) + __BaSO4 (s)
A. 4
B. 6
C. 8
D. 9
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19M.1.sl.TZ2.2:
What is the sum of the integer coefficients when propene undergoes complete combustion?
__C3H6 (g) + __O2 (g) → __CO2 (g) + __H2O (l)
A. 11
B. 17
C. 21
D. 23
- 19M.1.sl.TZ1.1: Which diagram represents a heterogeneous mixture?
- 19N.2.sl.TZ0.2a(i): Determine the mole ratio of S2O32− to O2, using the balanced equations.
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19N.2.hl.TZ0.6c(ii):
Write the half-equation for the formation of gas bubbles at electrode 1.
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19N.2.sl.TZ0.6b:
Another airbag reactant produces nitrogen gas and sodium.
Suggest, including an equation, why the products of this reactant present a safety hazard.
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19N.2.hl.TZ0.3c(i):
Write an equation for the complete combustion of the compound C3H8O formed in (a)(iv).
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19N.2.sl.TZ0.6a(i):
Deduce the equation for the decomposition of guanidinium nitrate.
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19N.1.sl.TZ0.2:
What is the sum of the coefficients when the equation is balanced with whole numbers?
__MnO2 (s) + __HCl (aq) → __MnCl2 (aq) + __H2O (l) + __Cl2 (g)
A. 6
B. 7
C. 8
D. 9
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19N.2.hl.TZ0.6c(iv):
Deduce the half-equation for the formation of the gas identified in (c)(iii).
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19N.2.sl.TZ0.3b:
Write an equation for the reaction of C2H5Cl with aqueous sodium hydroxide to produce a C2H6O compound, showing structural formulas.
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19N.2.sl.TZ0.3c(i):
Write an equation for the complete combustion of the organic product in (b).
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19N.2.sl.TZ0.5c(ii):
Write the half-equation for the formation of gas bubbles at electrode 1.
- 19N.1.sl.TZ0.3: Which is correct? A. Mixtures are either homogeneous or heterogeneous and their chemical...
