Acid–base titrations: past paper questions

Where the questions come from

• Question 38May/June 2026, paper 11Multiple choice1 mark

  Which piece of apparatus is used to add one reagent to another reagent during a titration?

  Try this question
• Question 37Oct/Nov 2025, paper 12Multiple choice1 mark

  Which piece of apparatus is used to measure the volume of acid required to neutralise $25.0{\text{ cm}}^3$ of alkali in a titration?

  Try this question
• Question 4Oct/Nov 2023, paper 41Essay6 marks

  Ammonium sulfate is a salt used in fertilisers. Ammonium sulfate is prepared by neutralising dilute sulfuric acid with aqueous ammonia. Plan an experiment to prepare pure dry crystals of ammonium sulfate.

  Try this question
• Question 9May/June 2026, paper 12Multiple choice1 mark

  During a titration, $25.0{\text{ cm}}^3$ of $0.050\text{ mol}\mathrm{/}{\text{dm}}^3$ aqueous sodium hydroxide, $\text{NaOH}$, reacts exactly with $20.0{\text{ cm}}^3$ of dilute phosphoric acid, ${\text{H}}_3{\text{PO}}_4$.

  Try this question
• Question 38Oct/Nov 2024, paper 12Multiple choice1 mark

  In a titration, a $25.0{\text{ cm}}^3$ sample of $0.100{\text{ mol / dm}}^3$ sodium hydroxide is exactly neutralised by $16.2{\text{ cm}}^3$ of dilute sulfuric acid. The equation for the reaction is shown.

  Try this question
• Question 38May/June 2023, paper 12Multiple choice1 markHas a diagram

  $25.0{\mathrm{c}\mathrm{m}}^3$ of $1.0\mathrm{m}\mathrm{o}\mathrm{l}\mathrm{/}{\mathrm{d}\mathrm{m}}^3$ sodium hydroxide is titrated with dilute sulfuric acid, using a suitable indicator. $25.0{\mathrm{c}\mathrm{m}}^3$ of the sulfuric acid is required to reach the end-point.

  Try this question
• Question 4May/June 2026, paper 42Essay6 marks

  Aqueous ammonia is an alkaline solution that is used to clean surfaces. The higher the concentration of aqueous ammonia, the better it is at cleaning surfaces. A student investigates three different samples of aqueous ammonia.

  Try this question
• Question 2May/June 2025, paper 41Structured14 marksHas a diagram

  Solid $\text{A}$ is impure calcium carbonate. A student determines the number of moles of calcium carbonate in a sample of $\text{A}$.

  Try this question
• Question 2Oct/Nov 2024, paper 41Structured14 marksHas a diagram

  A student titrates four samples of $0.800{\text{ mol/dm}}^3$ aqueous sodium hydroxide, $\text{NaOH(aq)}$, with aqueous ethanedioic acid.

  Try this question
• Question 2May/June 2023, paper 41Structured14 marksHas a diagram

  White vinegar is a colourless solution containing ethanoic acid.

  Try this question
• Question 2May/June 2025, paper 42Structured14 marksHas a diagram

  Solid $\mathbf{W}$ is an impure organic acid, ${\text{H}}_3\text{A}$. A student determines the mass of ${\text{H}}_3\text{A}$ in a sample of $\mathbf{W}$ by titration with $0.100{\text{ mol/dm}}^3$ sodium hydroxide, $\text{NaOH}$.

  Try this question
• Question 2Oct/Nov 2024, paper 42Structured14 marksHas a diagram

  A student titrates four samples of aqueous sodium carbonate with $0.500{\mathrm{m}\mathrm{o}\mathrm{l}\mathrm{/}\mathrm{d}\mathrm{m}}^3$ dilute hydrochloric acid, $\mathrm{H}\mathrm{C}\mathrm{l}(\mathrm{a}\mathrm{q})$.

  Try this question
• Question 2May/June 2023, paper 42Structured14 marksHas a diagram

  Aqueous ammonia is a solution of ammonia gas.

  Try this question
• Question 9May/June 2024, paper 12Multiple choice1 mark

  In a volumetric experiment, $25.0{\mathrm{c}\mathrm{m}}^3$ of $0.100\mathrm{m}\mathrm{o}\mathrm{l}\mathrm{/}{\mathrm{d}\mathrm{m}}^3$ sodium hydroxide reacts exactly with $20.0{\mathrm{c}\mathrm{m}}^3$ of dilute sulfuric acid.

  Try this question
• Question 39May/June 2024, paper 12Multiple choice1 markHas a diagram

  Two titrations of dilute hydrochloric acid with aqueous sodium hydroxide are done using two different indicators, methyl orange and thymolphthalein. The equation for the reaction is shown.

  Try this question
• Question 1May/June 2024, paper 41Structured6 marksHas a diagram

  A student finds the concentration of a dilute acid, $\text{HA(aq)}$, by titration.

  Try this question
• Question 1May/June 2024, paper 42Structured6 marksHas a diagram

  A student finds the amount of iron(II) ions in a solution by titration.

  Try this question