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Question:

The temporary hardness of water is due to: Ca(HCO3)2, NaCl, Na2SO4, CaCl2

Na2SO4

CaCl2

NaCl

Ca(HCO3)2

Solution:

Temporary hardness is caused by bicarbonates of calcium and magnesium. Ca(HCO3)2 is responsible for temporary hardness of water.