1 meq/ L of hardness of water is equivalent to presence of:
Correct Answer: 50 mg calcium bicarbonate in 1 litre of water
Description: Hardness of water is expressed in meq/L. 1 meq/L of hardness producing ion is equal to 5o mg of calcium bicarbonate in 1 litre of water. Ref: Park 21st edition page: 671.
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