Experiments to measure the rate of reaction

1 mark · Easy

State one factor that can be changed to investigate its effect on the rate of a reaction between a solid and a liquid.

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surface area of the solid; concentration of the liquid; temperature of the mixture; use of a catalyst

Also accept: change the surface area; change the concentration; change the temperature; add a catalyst; use powdered solid instead of lumps; increase or decrease concentration of acid; heat the mixture; use a catalyst

Common mistakes: amount of reactant (without specifying factor); volume of gas collected

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Marking points

B1 · 1 mark · States one valid variable that affects rate (surface area, concentration, temperature, catalyst).

Worked solution

Possible answers: surface area of the solid, concentration of the acid, temperature, use of a catalyst.