| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.hl.TZ1.25 |
| Level | HL | Paper | 1 | Time zone | TZ1 |
| Command term | Solve | Question number | 25 | Adapted from | N/A |
Question
What is the pH of a solution in which the hydroxide ion concentration is 1 × 10−11 mol dm−3 at 298 K?
Kw = 1 × 10−14 at 298 K
A. 3
B. 7
C. 11
D. 14
Markscheme
A
Examiners report
[N/A]
Syllabus sections
Show 41 related questions
- 18M.2.sl.TZ2.2c: Outline why pH is more widely used than [H+] for measuring relative acidity.
- 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. ...
- 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...
- 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...
- 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...
- 14M.1.sl.TZ1.22: A solution of \({\text{50 c}}{{\text{m}}^{\text{3}}}\) hydrochloric acid has a pH of 4. What...
- 14M.2.sl.TZ2.5d: (i) One group suggested recording how long it takes for the pH of the solution to change...
- 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...
- 14N.2.hl.TZ0.1e: The acidity of non-polluted rain water is caused by dissolved carbon dioxide. State an...
- 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...
- 14N.2.sl.TZ0.1d: The acidity of non-polluted rain water is caused by dissolved carbon dioxide. State an...
- 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...
- 13N.2.sl.TZ0.5c.iv: Neelu and Charles decided to compare the volume of sodium hydroxide solution needed with...
- 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...
- 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...
- 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 \({\text{50.0 c}}{{\text{m}}^{\text{3}}}\)...
- 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,...
- 09M.1.sl.TZ2.23: An example of a strong acid solution is perchloric acid,...
- 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...
- 11M.1.sl.TZ2.22: The pH of a solution changes from \({\text{pH}} = 2\) to \({\text{pH}} = 5\). What happens to...
- 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...
