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CAIE IGCSE Chemistry Concentration Temperature Surface Area and Catalysts

Practise predicting how concentration, pressure, surface area, temperature or a catalyst changes rate and sketching the corresponding progress curve.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • predict faster rate from greater concentration, pressure, surface area or temperature
  • state that adding a catalyst increases rate while removing it decreases rate
  • sketch a steeper progress curve that reaches the same final amount when only rate changes

6.2.1—Rate changes caused by concentration question 1

[Maximum number: 2]

Some elements are shown in the order they appear in the reactivity series. The most reactive element is at the top.
> sodium calcium magnesium aluminium zinc iron hydrogen copper

When zinc granules are added to aqueous copper(II) sulfate, a reaction occurs. During the reaction, a red-pink solid is formed and the solution becomes colourless.

Suggest two other ways of increasing the rate of this reaction.

1

2

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