Question

1: the hardness of a water sample (in ppm) (in terms of equivalents of caco3) containing 10–3m caso4 is : (molar mass of caso4 = 136g/mol).

Answer 1

The simple definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, largely calcium and magnesium. You may have felt the effects of hard water, literally, the last time you washed your hands.

Answer 2

Answer:

Moles of CaSO4 = 10–3 moles Mass of water = 1000g DOH (in terms of CaCO3) = (10-3 x 100)/1000 x 106 = 100ppmRead more on Sarthaks.com - https://www.sarthaks.com/332000/the-hardness-of-a-water-sample-in-terms-of-equivalents-of-caco3-containing-10-3m-caso4-is