(i)
What is temporary hard water?
(ii)
Write a chemical equation to show how the temporary hard water can be softened by heating.
State five ways of conserving water in the home.
(i)
What are tidal waves?
(ii)
State four ways in which water could be contaminated.
(i)
Arrange the following stages of water treatment for public consumption in the correct order:
chlorination, sedimentation, screening, sand filtration and aeration
(ii)
State the significance of each of the following stages in water treatment:
(α)
screening;
(β)
filtration;
(γ)
chlorination.
State one significance each of the following stages of treatment of water for public consumption:
(i) Aeration;
(ii) Sedimentation;
(iii) Filtration;
(iv) Chlorination;
(v) Coagulation.
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