Which statement about pH is correct?
At temperatures below 298 K298\text{ K}298 K, the pH of pure water is greater than 777.
The pH of a 0.50 mol dm−30.50\text{ mol dm}^{-3}0.50 mol dm−3 nitric acid solution is approximately −0.30-0.30−0.30.
The pH of 0.05 mol dm−30.05\text{ mol dm}^{-3}0.05 mol dm−3 sulfuric acid is greater than that of 0.05 mol dm−30.05\text{ mol dm}^{-3}0.05 mol dm−3 hydrochloric acid.
The pH of a weak acid is independent of temperature.
77 exam-style questions on AQA A Level Chemistry Acids and bases (A-level only), covering Brønsted–Lowry acid–base equilibria in aqueous solution (A-level only), Definition and determination of pH (A-level only), The ionic product of water, $K_w$ (A-level only), Weak acids and bases $K_a$ for weak acids (A-level only), pH curves, titrations and indicators (A-level only), and Buffer action (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.