Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Chemical Changes
State the pH value of a neutral solution.
- 2Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 3Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 4Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
- 5Exothermic and Endothermic Reactions
On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
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