Edexcel IGCSE Chemistry 3.8 Factors affecting rate

Edexcel IGCSE Chemistry syllabusChemistry 4CH1First assessment 2019

Practise planning temperature-change investigations for dissolving, neutralisation, displacement and combustion reactions.

A student investigates the reaction between zinc and copper(II) sulfate solution.
This is the equation for the reaction.

\mathrm{Zn}(\mathrm{~s})+\mathrm{CuSO}_{4}(\mathrm{aq}) \rightarrow \mathrm{ZnSO}_{4}(\mathrm{aq})+\mathrm{Cu}(\mathrm{~s})

This is the student's method.
Step 1 add $25.0 \mathrm{~cm}^{3}$ of copper(II) sulfate solution to a glass beaker
Step 2 record the temperature of the solution
Step 3 add between 5 g and 6 g of zinc powder (an excess) and stir the mixture
Step 4 record the highest temperature reached

Question 10