Which is the concentration of KOH(aq)\text{KOH(aq)}KOH(aq), in mol dm−3\text{mol dm}^{-3}mol dm−3, that has pH=14.10\text{pH} = 14.10pH=14.10?
Kw=1.00×10−14 mol2 dm−6K_{\text{w}} = 1.00 \times 10^{-14} \text{ mol}^2 \text{ dm}^{-6}Kw=1.00×10−14 mol2 dm−6 at 25 ∘C25\ ^\circ\text{C}25 ∘C.
−1.00-1.00−1.00
7.94×10−157.94 \times 10^{-15}7.94×10−15
1.26×10141.26 \times 10^{14}1.26×1014
1.261.261.26
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.