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6.1 Rate of reaction

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Question 36

The same mass of a solid reactant is supplied in two sets.

  • Set A contains one spherical pellet with a radius of 6.00 mm.
  • Set B contains eight spherical pellets, each with a radius of 3.00 mm.

No solid is lost when the smaller pellets are made. The pellets in each set are added separately to the same volume and concentration of another reactant at the same temperature. The whole surface of every pellet is exposed.

The surface area of a sphere is 4πr24\pi r^24πr2.

a.

Calculate the total exposed surface area of each set of pellets.

Give each answer to the nearest whole mm2\text{mm}^2mm2.

[2]
b.

State which set of pellets will react faster. Explain your answer.

[3]
Markscheme

6.1 Rate of reaction Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Rate of reaction

127 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.

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