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Acids and bases (A-level only)

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Question 8

A strong acid H2Y\text{H}_2\text{Y}H2​Y dissociates completely in aqueous solution:

H2Y(aq)→2H+(aq)+Y2−(aq) \text{H}_2\text{Y}(\text{aq}) \rightarrow 2\text{H}^+(\text{aq}) + \text{Y}^{2-}(\text{aq}) H2​Y(aq)→2H+(aq)+Y2−(aq)

What is the pH\text{pH}pH of a 0.025 mol dm-3 solution of this acid?

A

1.121.121.12

B

1.301.301.30

C

1.601.601.60

D

2.002.002.00

Markscheme

Acids and bases (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Acids and bases (A-level only)

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.

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