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Edexcel IGCSE Chemistry 3.16 catalyst practical

Practise catalyst-practical questions by reading hydrogen peroxide oxygen-volume graphs, drawing tangents and comparing solids fairly.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Read oxygen volume from a graph and show the vertical line used to obtain the value.
  • Calculate rate from a tangent to the oxygen-volume curve, including cm3 per minute.
  • Compare catalysts fairly by keeping hydrogen peroxide volume and catalyst mass constant.

3.16 Catalytic decomposition practical question 1

[Maximum number: 5]

A student uses this apparatus to investigate the decomposition of hydrogen peroxide solution.

Figure for Question 3.16 Catalytic decomposition practical question 1 — Edexcel IGCSE Chemistry

This is the equation for the reaction.

2H2O2→2H2O+O22 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}

Potassium iodide has been suggested as an alternative catalyst to manganese(IV) oxide.

Describe a method to show which catalyst is more effective for the decomposition of hydrogen peroxide.

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