Name:…………………………………………………….
Date: ……………………
Electrolysis Worksheet
This worksheet accompanies Electrolysis Summary.
1. a) Complete the sentences using words from the box below.
Electrolysis is the process of breaking down an ionic substance using …………………. The
broken down substance is called the …………………. Ionic substances contain charged
particles called ………………. The electrolyte also contains positive and negative ions.
During electrolysis, the negative ions travel to the positive electrode and …………………
electrons. This process is called ………………….
The positive ions travel to the negative electrode and ………………… electrons. This
process is called …………………. In addition, ………………… form at the negative electrode
and non-metals form at the positive electrode.
lose
metals
oxidation
non-metals
reduction
electrolyte
gain
electricity
ions
b) Complete these equations for the electrolysis of lead bromide.
i) lead bromide → …………………
ii) PbBr2(l) → …………………
iii) At the negtaive electrode: Pb2+ + 2e- → ………
iv) At the positive electrode: ………Br - → Br2 + 2e2. How can the products of the electrolysis of sodium chloride solution be used?
Draw lines between the boxes on the left and the boxes on the right to match each
product to its use.
chlorine
margarine
hydrogen
soap
sodium hydroxide
plastic
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Name:…………………………………………………….
Date: ……………………
3. What products are formed at each of the electrodes during the electrolysis of sodium
chloride solution? Label the diagram below.
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Name:…………………………………………………….
Date: ……………………
4. Write a word equation to show the electrolysis of sodium chloride solution:
……………………………………
…………………………………………
5. a) Explain what happens to the negatively-charged chloride ions during electrolysis.
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
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c) Electrode equation:
……………………………………
……...………………………………………
d) Explain what happens to the positively-charged hydrogen ions during electrolysis.
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……………………………………………………………………………………………………………
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e) Electrode equation:
…………………………………..
…………………………..…..………………
6. Explain what happens to the sodium and hydroxide ions after electrolysis.
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