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5.2 Controlling reactions

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Question 20
F

A student adds 1.0 g of magnesium ribbon to 50 cm350\,\mathrm{cm^{3}}50cm3 of dilute hydrochloric acid. The acid is in excess. The student measures the volume of hydrogen made.

Which change would make the initial rate greater and increase the total volume of hydrogen made?

[1]
A

Using 50 cm350\,\mathrm{cm^{3}}50cm3 of more concentrated hydrochloric acid

B

Using 1.0 g of magnesium powder instead of ribbon

C

Using 2.0 g of the same magnesium ribbon

D

Warming the acid to a higher temperature

Markscheme

5.2 Controlling reactions Questions

  1. GCSE
  2. /Chemistry
  3. /5.2 Controlling reactions

56 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.

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