Daily Practice · GCSE Science

Daily Practice - GCSE Science

22nd May 1994

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
State the pH value of a neutral solution.
2
Reactivity, Acids and Salts
Explain the difference between a strong acid and a concentrated acid.
3
Electrolysis
Aqueous copper sulfate solution is electrolysed using inert graphite electrodes. State the products formed at (a) the cathode and (b) the anode, giving a reason for each.
4
Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
5
Exothermic and Endothermic Reactions
A student heats solid copper carbonate strongly in a test tube, and it breaks down into copper oxide and carbon dioxide. Heating must be continued throughout the reaction for it to keep going. State whether this thermal decomposition reaction is exothermic or endothermic, and explain your reasoning.

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