Chemistry, asked by swedhoni, 5 months ago

21. About 100 mL of water sample has a hardness equivalent to 20 mL of 0.05 N CaSO4.
What is the hardness in ppm?​

Answers

Answered by najiya6612
1

Explanation:

100mL of a water sample contains 0.81g of calcium bicarbonate and 0.73 of magnesium bicarbonate. The hardness of this water sample expressed in terms of equivalents of CaCO3 is:

(molar mass of calcium bicarbonate is 162g mol−1 and magnesium bicarbonate is 146gmol−1)

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