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Calculate all types of hardness of water sample
written 8.5 years ago by gravatar for teamques10 teamques10 ★ 69k •   modified 8.5 years ago

Calculate all types of hardness of water sample containing: -

$Ca(HCO_3)_2$ - 81 ppm, MgSO4 - 60ppm, MgCO,-42 ppm, Ca(NO), 82 ppm.

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

Marks: 3M

Year: May 2015
engineering chemistry
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written 8.5 years ago by gravatar for teamques10 teamques10 ★ 69k
Constituents Quantity Multiplication factor CaCO3 equivalent
$Ca(HCO3)2$ 81 100/162 50
$MgSO4$ 60 100/120 50
$MgCO3$ 42 100/84 50
Ca(NO3)2 82 100/164 50

Temporary Hardness $= Ca(HCO_3)_2 + MgCO_3 \\ = 50 + 50 \\ = 100 ppm$

Permanent Hardness = $MgSO_4 + Ca(NO_3)_2 \\ = 50 + 50 \\ = 100 ppm$

∴ Total Hardness = Temporary + Permanent = 200 ppm
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