Metal
Mass of copper produced in grams
Experiment 1
Iron - 1.1
Magnesium - 2.3
Zinc - 0.9
Experiment 2
Iron - 1.3
Magnesium- 3.2
Zinc - 0.8
Experiment 3
Iron - 1.2
Magnesium- 2.2
Zinc - 1.10
(a) How can you tell that one of the results has been recorded to a
greater precision than the others?
(b) Write a balanced chemical equation, including state symbols,
for the reaction taking place between magnesium and
copper(II) sulphate.
(c)
(i) State, in terms of electrons, what happens when a copper
ion becomes a copper atom
(ii) What name is given to the type of change occurring in
(c)(i)?
(iii) State two observations you would expect to make when
magnesium is added to copper(II) sulphate solution.