Metals, Plastics, Fertilisers, Nuclear Chemistry Worksheet - National 5 Unit 3 Page 4
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13Exercise 3 – Electrochemical Cells
1. The voltages between pairs of metals can be used to place them in the electrochemical
series.
Metal
Voltage
Direction of
(V)
electron flow
1
0.6
Metal to copper
2
0.2
Copper to metal
3
0.9
Metal to copper
4
0.1
Copper to metal
a) Give the order of reactivity of the metals 1 – 4, starting with the most reactive.
b) Suggest a name for each of the metals.
2. a) Copy and complete the following word equations and decide which will react.
1. Zinc(II) + copper(II) sulphate
2. Zinc(II) + iron(II) nitrate
3. Iron(II) + magnesium chloride
4. Iron(II) + lead(IV) chloride
5. Copper(II) + silver(I) sulphate
6. Copper(I) + lead(IV) nitrate
b) Using your answers from a), where a reaction occurs, write ion electron half equations
for each of the reactions.
c) Label each of these equations either oxidation or reduction.
d) Then combine these half equations to write a balanced redox equation.
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