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8.1 Rates of reaction

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Question 26
F

The same mass of magnesium reacts with excess acid at 20 ∘C20\,^\circ\mathrm{C}20∘C and at 40 ∘C40\,^\circ\mathrm{C}40∘C. The same final volume of hydrogen is obtained. Why?

[1]
A

Temperature changes the activation energy, not the rate

B

Both reactions have the same rate, as the same mass is used

C

Temperature affects the final volume only if a catalyst is used

D

Temperature affects the rate, not how much magnesium reacts

Markscheme

8.1 Rates of reaction Questions

  1. GCSE
  2. /Chemistry
  3. /8.1 Rates of reaction

54 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.

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