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A Zeolite softener was regenerated by passing 200 litre of NaCl solution, containing 50g/litre of NaCl. How many litre of water of hardness 50 ppm can be softened by this softener?
written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.9 years ago

Mumbai University > First Year Engineering > Sem1 > Applied Chemistry 1

Marks: 4M

Year: May 2015
engineering chemistry
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written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k

50g i.e.50 X $10^3$ mg of NaCl → 1 litre

∴ 200 litre of solution contains → 200 X 50 X $10^3$ = $10^7$ mg

$CaCO_3$ equivalent = $10^7 X \frac{10^2}{2 X 58.5} = \frac{10^9}{117} = 8.55 X 10^{-3} X 10^9 \\ = 8.55 X 10^6 \ \ mg \ …

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