Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
3rd October 2023
- 1Electrolysis
Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
- 2Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
- 3Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
- 4Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
- 5Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.
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