Daily Practice · GCSE Science

Daily Practice - GCSE Science

19th August 1996

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
2
Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
3
Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
4
Energy Changes
Give one everyday example of an endothermic process.
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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