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3.4 Using concentrations of solutions in mol/dm3

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Question 4
H

A student carried out a titration to find the concentration of a solution of potassium hydroxide, KOH\text{KOH}KOH.

The student put 25.0 cm3 of the potassium hydroxide solution into a conical flask, then added 0.0500 mol/dm3 hydrochloric acid from a burette until the indicator changed colour.

KOH+HCl→KCl+H2O\text{KOH} + \text{HCl} \rightarrow \text{KCl} + \text{H}_2\text{O}KOH+HCl→KCl+H2​O

The figure shows the burette scale before and after the acid was added.

Figure: The burette scale before and after the hydrochloric acid was added

image

a.

Use the figure to determine the volume of hydrochloric acid added.

[2]
b.

Calculate the concentration of the potassium hydroxide solution in mol/dm3\text{mol/dm}^3mol/dm3.

[3]
Markscheme

3.4 Using concentrations of solutions in mol/dm3 Questions

  1. GCSE
  2. /Chemistry
  3. /3.4 Using concentrations of solutions in mol/dm3

40 exam-style questions on AQA GCSE Chemistry 3.4 Using concentrations of solutions in mol/dm3, covering 3.4.1 Concentration in mol/dm3. Each one has a worked solution and a mark scheme showing where the marks go.

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