An experiment uses ethanoic acid with a pH of 4. A technician needs a replacement solution with the same hydrogen ion concentration.
The available solutions are shown in the table.
| Solution | Acid | pH |
|---|---|---|
| P | ethanoic acid | 5 |
| Q | citric acid | 3 |
| R | nitric acid | 4 |
| S | hydrochloric acid | 2 |
Which solution should the technician choose?
solution R
solution S
solution Q
solution P
88 exam-style questions on AQA GCSE Chemistry 4.2 Reactions of acids, covering 4.2.1a Reactions of acids with metals, 4.2.1b Redox in acid-metal reactions, 4.2.2 Neutralisation of acids and salt production, 4.2.3 Soluble salts, 4.2.4 The pH scale and neutralisation, 4.2.5a Titrations, 4.2.5b Calculating quantities in titrations, and 4.2.6 Strong and weak acids. Each one has a worked solution and a mark scheme showing where the marks go.