Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
20th September 2011
- 1Moles, Formulae and Equations
Why is the amount of product directly proportional to the amount of limiting reactant?
- 2Concentration, Yield and Atom Economy
Give the formula for percentage yield.
- 3Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
- 4Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
- 5Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of September 2011, including the monthly compilation PDF.