DP Chemistry Questionbank

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Directly related questions

• 18M.2.sl.TZ2.2c: Outline why pH is more widely used than [H+] for measuring relative acidity.
• 18M.1.hl.TZ1.25: What is the pH of a solution in which the hydroxide ion concentration is 1 × 10−11 mol dm−3 at...
• 17N.1.sl.TZ0.20: Which statement is incorrect for a 0.10 mol dm–3 HCOOH solution? A. pH = 1 B. [H+] <<...
• 17N.1.sl.TZ0.19: 10.0 cm3 of an aqueous solution of sodium hydroxide of pH = 10 is mixed with 990.0 cm3 of...
• 17N.1.sl.TZ0.18: What will happen if the pressure is increased in the following reaction mixture at...
• 17M.2.sl.TZ2.7b.iii: Calculate [H+] in the NaOH solution.
• 17M.1.hl.TZ1.25: What is the pH of 1.0 × 10−3 mol dm−3 sodium hydroxide, NaOH(aq)? Kw = 1.0 × 10−14 A.     3 B....
• 16N.2.sl.TZ0.2b: Suggest why it is more convenient to express acidity using the pH scale instead of using the...
• 16M.2.hl.TZ0.1d: Impurities cause phosphine to ignite spontaneously in air to form an oxide of phosphorus and...
• 16M.2.sl.TZ0.2b: (i) State the equation for the reaction of this oxide of phosphorus with water. (ii) Predict how...
• 15M.1.sl.TZ2.22: \({\text{10.0 c}}{{\text{m}}^{\text{3}}}\) of a solution of a strong acid with a pH of 3 is added...
• 15M.2.sl.TZ1.6c.ii: Suggest the pH of the solutions formed in part (c) (i).
• 14M.2.hl.TZ1.6d: (i)     Determine the mass of copper produced at one of the electrodes in cell 2 if the tin...
• 14M.2.hl.TZ2.6d: (i)     One group suggested recording how long it takes for the pH of the solution to change by...
• 14M.1.sl.TZ1.22: A solution of \({\text{50 c}}{{\text{m}}^{\text{3}}}\) hydrochloric acid has a pH of 4. What is...
• 14M.2.sl.TZ2.5d: (i)     One group suggested recording how long it takes for the pH of the solution to change by...
• 14N.2.hl.TZ0.1a: Use the data in the table to identify the most acidic water sample.
• 14N.2.hl.TZ0.1c: Determine the ratio of \({\text{[}}{{\text{H}}^ + }{\text{]}}\) in bottled water to that in rain...
• 14N.2.hl.TZ0.1e: The acidity of non-polluted rain water is caused by dissolved carbon dioxide. State an equation...
• 14N.2.sl.TZ0.1a: Use the data in the table to identify the most acidic water sample.
• 14N.2.sl.TZ0.1c: Determine the ratio of \({\text{[}}{{\text{H}}^ + }{\text{]}}\) in bottled water to that in rain...
• 14N.2.sl.TZ0.1d: The acidity of non-polluted rain water is caused by dissolved carbon dioxide. State an equation...
• 13N.2.hl.TZ0.7d.i: Neelu and Charles decided to solve the problem by determining the volume of...
• 13N.2.hl.TZ0.7d.iv: Francisco and Shamiso decided to measure the pH of the initial solution, HQ, and they found that...
• 13N.2.sl.TZ0.5c.iv: Neelu and Charles decided to compare the volume of sodium hydroxide solution needed with those...
• 13N.2.sl.TZ0.5c.iii: Neelu and Charles decided to solve the problem by determining the volume of...
• 13N.2.sl.TZ0.5c.vi: Francisco and Shamiso decided to measure the pH of the initial solution, HQ, and they found that...
• 13M.2.hl.TZ1.1f.ii: With reference to the graph on page 4, describe the effect of increasing temperature on the...
• 13M.1.sl.TZ1.22: A solution of acid HX has a pH = 1 and a solution of acid HY has a pH = 3. Which statement must...
• 13M.2.sl.TZ2.3a.i: Deduce the change in hydrogen ion concentration, \({\text{[}}{{\text{H}}^ + }{\text{]}}\).
• 12N.2.sl.TZ0.5b.vi: When lime was added to a sample of soil, the pH changed from 5 to 7. Calculate the factor by...
• 09N.2.hl.TZ0.8c.ii: Calculate the pH of a solution prepared by mixing \({\text{50.0 c}}{{\text{m}}^{\text{3}}}\) of...
• 09N.2.sl.TZ0.6c.i: Calculate the hydrogen ion concentrations in the two solutions and identify the stronger acid.
• 09N.2.sl.TZ0.6c.ii: Determine the ratio of the hydrogen ion concentrations in the two solutions X and Y.
• 09M.1.hl.TZ1.27: What is the correct expression for the ionic product constant of water, \({K_{\text{w}}}\)? A.  ...
• 09M.1.sl.TZ2.23: An example of a strong acid solution is perchloric acid, \({\text{HCl}}{{\text{O}}_{\text{4}}}\),...
• 11M.2.hl.TZ1.8d: Determine the pH of the solution resulting when \({\text{100 c}}{{\text{m}}^{\text{3}}}\) of...
• 11M.2.sl.TZ1.5c.iii: Black coffee has a pH of 5 and toothpaste has a pH of 8. Identify which is more acidic and deduce...
• 11M.1.sl.TZ2.22: The pH of a solution changes from \({\text{pH}} = 2\) to \({\text{pH}} = 5\). What happens to the...
• 12M.1.sl.TZ2.22: Three aqueous solutions of nitric acid are listed below. W.    ...
• 11N.2.hl.TZ0.4a: State the expression for the ionic product constant of water, \({K_{\text{w}}}\).
• 11N.1.sl.TZ0.22: What is the pH of the solution formed when \({\text{10 c}}{{\text{m}}^{\text{3}}}\) of HCl(aq)...