What is the pH of a 0.015 mol dm-3 solution of barium hydroxide, Ba(OH)2\text{Ba(OH)}_2Ba(OH)2, at 298 K?
(Assume Kw=1.00×10−14 mol2dm−6K_w = 1.00 \times 10^{-14}\text{ mol}^2\text{dm}^{-6}Kw=1.00×10−14 mol2dm−6 at 298 K)
1.521.521.52
12.1812.1812.18
12.4812.4812.48
1.821.821.82
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.