What is the pH of a 0.28 mol dm-3 solution of sodium hydroxide at 298 K?
(Kw=1.0×10−14 mol2 dm−6K_{\text{w}} = 1.0 \times 10^{-14}\text{ mol}^2\text{ dm}^{-6}Kw=1.0×10−14 mol2 dm−6 at 298 K)
0.550.550.55
13.4513.4513.45
13.7213.7213.72
14.5514.5514.55
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.