Daily Practice · GCSE Science

Daily Practice - GCSE Science

16th March 1998

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
2
Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
3
Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
4
Energy Changes
State whether the combustion of methane is exothermic or endothermic.
5
Exothermic and Endothermic Reactions
A student reacts excess zinc powder with 25 cm3 of copper sulfate solution in a polystyrene cup. The starting temperature is 21.0 degrees C and the maximum temperature reached is 58.5 degrees C. Calculate the temperature change.

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