An exhausted zeolite softener was regenerated by passing 75 liters of a solution having a strength of 150 g/liter of NaCl. How many liters of water samples having a hardness of 300 ppm can be softened using this softener?
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Total amount of NaCl required for regeneration = 150 x 103 x 150
= 225 x 105
58.5 gm of NaCl = 50 gm of CaCO3
225 x 105 mg NaCl = 225 x 105/58.5 X 50
CaCO3 equivalent of NaCl =192.31 X 105mg of CaCO3
Hardness of 1 lit of water = 600 ppm
Volume of water =CaCO3 equivalent of NaCl /hardness
Volume of water =192.31 X 105 /600
Volume of water =32051 lit
Explanation:
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