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3.4 Using concentrations of solutions in mol/dm3

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Question 20

A laboratory technician has 15.0 g of ammonium chloride, NH4Cl\text{NH}_4\text{Cl}NH4​Cl. The technician needs to prepare 500 cm3 of ammonium chloride solution with a concentration of 0.800 mol/dm3.

The relative formula mass, MrM_rMr​, of ammonium chloride is 53.5.

a.

Calculate the amount, in mol\text{mol}mol, of ammonium chloride needed to prepare the solution.

[2]
b.

Calculate the mass of additional ammonium chloride the technician must obtain.

[2]
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

106 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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