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Acids and bases (A-level only)

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Question 3

In the following aqueous equilibrium:

HCO3−(aq)+HSO4−(aq)⇌H2CO3(aq)+SO42−(aq) \text{HCO}_3^{-}(\text{aq}) + \text{HSO}_4^{-}(\text{aq}) \rightleftharpoons \text{H}_2\text{CO}_3(\text{aq}) + \text{SO}_4^{2-}(\text{aq}) HCO3−​(aq)+HSO4−​(aq)⇌H2​CO3​(aq)+SO42−​(aq)

which pair contains only species that behave as Brønsted–Lowry bases?

A

HCO3−\text{HCO}_3^{-}HCO3−​ and SO42−\text{SO}_4^{2-}SO42−​

B

HSO4−\text{HSO}_4^{-}HSO4−​ and H2CO3\text{H}_2\text{CO}_3H2​CO3​

C

HCO3−\text{HCO}_3^{-}HCO3−​ and H2CO3\text{H}_2\text{CO}_3H2​CO3​

D

HSO4−\text{HSO}_4^{-}HSO4−​ and SO42−\text{SO}_4^{2-}SO42−​

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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