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Calculate lime & soda recorded for softening 1 litre of water.
written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.9 years ago

A water sample has the analytical report as under: MgCO,– 84 ppm, CaCO, = 40 ppm, CaCl2 - 5 ppm, Mg (NO), -37 ppm, KCl = 10 ppm. Calculate lime & soda recorded for softening 1 litre of water.

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

Marks: 6M

Year: May 2015
engineering chemistry
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written 7.9 years ago by gravatar for teamques10 teamques10 ★ 65k
Constituents Quantity Multiplication factor CaCO3 equivalent
MgCO3 84 100/84 100
CaCO3 40 100/100 40
CaCl2 5 100/101 4.5
Mg(NO3)2 37 100/148 25
KCl 10 - -

Lime = $\frac{74 (2 X 100+40+25)}{100} = 19610/100 = 196.1$ %

Soda = $\frac{106 (4.5+2.5)}{100} = 31.27$%

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