Question

A Zeolite process was completely exhausted and was regenerated by passing

1.00 liter of solution containing 120 gm/liter of NaCl. How many liters of water of hardness 500

ppm can be softened by the softener before regenerating it again ?
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Answer 1

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Answer 2

Answer:

50g i.e.50 X 103 mg of NaCl → 1 litre

∴ 200 litre of solution contains → 200 X 50 X 103 = 107 mg

CaCO3 equivalent = 107X1022X58.5=109117=8.55X10−3X109=8.55X106 mg of CaCO3 equivalent

Now, 1 litre of water → 50 ppm

∴ x → 8.55 X 106

∴ x=8.55X10650 = 0.171 X 106 litres of water

∴ 171 X 103 litres of water can be softened by zeolite softener.

Explanation:

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