Question

50 litres of water containing ca(HCo3)2,whe converted into soft water required 22.5g of calcium hydroxide .calculate the amount of ca(HCo3)2 per litres of hand water?

Answer 1

Answer:

0.49g

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Explanation:

Ca(HCO3)2+2Ca(OH)2→2CaCO3+Ca(OH)2⏐↓+2H2O

162g of Ca(HCO3)2 requires 148g ofCa(OH)2

xg                                          22.5g

$x=\frac{22.5*162}{148}$

x=24.62g

24.62g present in 50l of water

amount present in 1lof water is 24.62/50=0.49g