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5.1 Monitoring chemical reactions

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Question 6

A quality-control test is carried out on a well-mixed salt solution. The water is evaporated from an 80.0 cm3\mathrm{cm^{3}}cm3 sample of the solution, leaving 2.40 g of dry salt.

What is the concentration of the original solution?

[1]
A

3.00 g/dm3\mathrm{g/dm^{3}}g/dm3

B

33.3 g/dm3\mathrm{g/dm^{3}}g/dm3

C

30.0 g/dm3\mathrm{g/dm^{3}}g/dm3

D

0.0300 g/dm3\mathrm{g/dm^{3}}g/dm3

Markscheme

5.1 Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.1 Monitoring chemical reactions

152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.

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