Daily Practice · GCSE Science

Daily Practice - GCSE Science

8th February 1995

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
State the value of the Avogadro constant and what it counts.
2
Concentration, Yield and Atom Economy
Convert a concentration of 0.20 moles per cubic decimetre of NaOH into grams per cubic decimetre. (Mr = 40)
3
Chemical Changes
State the name given to a reaction in which a substance loses electrons.
4
Reactivity, Acids and Salts
Define oxidation in terms of electrons.
5
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.

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