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Question

100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate. The hardness of this water sample expressed in terms of equivalents of CaCO3 is:
(molar mass of calcium bicarbonate is 162 gmol1 and magnesium bicarbonate is 146 gmol1)

A
10000 ppm
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B
1000 ppm
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C
5000 ppm
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D
100 ppm
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