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3.2 Use of amount of substance in relation to masses of pure substances

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Question 32
H

A student had two solutions of potassium chloride.

Solution A contained 6.0 g of potassium chloride in 200 cm3 of solution.

Solution B had a concentration of 25 g/dm3.

a.

Calculate the concentration of solution A in g/dm3\text{g/dm}^3g/dm3.

[3]
b.

Give the letter of the solution that is more concentrated.

[1]
c.

Explain what happens to the concentration of a solution when more water is added to it, but the mass of solute stays the same.

[2]
Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Use of amount of substance in relation to masses of pure substances

131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.

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