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Acids and bases (A-level only)

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Question 41

Equal volumes of two solutions, each with the same concentration, are mixed together at 298 K.

Which two solutions, when mixed, form a solution with a $pH<7\text{pH} < 7$ ?

$NaOH\text{NaOH}$ and $CH3COOH\text{CH}_3\text{COOH}$

$NH3\text{NH}_3$ and $HCl\text{HCl}$

$NH3\text{NH}_3$ and $NH4Cl\text{NH}_4\text{Cl}$

$KOH\text{KOH}$ and $HNO3\text{HNO}_3$

Markscheme

Acids and bases (A-level only) Questions

A Level
Chemistry
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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