(a) When is a sample of water said to be hard? (b) State one difference between temporary and permanent hardness of water (c) Give one method of removing ha...
Question 1 Report
(a) When is a sample of water said to be hard?
(b) State one difference between temporary and permanent hardness of water
(c) Give one method of removing hardness completely from water
(d) Name two local is used for the production of soap.
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