50 liter of water containing Ca(HCO3)2 when converted into soft water required 22.2g of Ca(OH)2 . Calcultated the amount of Ca(HCO3)2 per liter of hand water.
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sarikakhajotiya
sarikakhajotiya
1 week ago
Chemistry
Secondary School
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50 liter of water containing Ca(HCO3)2 when converted into soft water required 22.2g of Ca(OH)2 . Calcultated the amount of Ca(HCO3)2 per liter of hand water.
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sonuvuce
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The amount of Ca(HCO_3)_2 present in per litre of hard water is 0.972
Explanation:
The reaction is
Ca(HCO_3)_2+Ca(OH)_2\rightarrow2CaCO_3+2H_2O
Molecular weight of Ca(HCO_3)_2 is 162
Molecular weight of Ca(OH)_2 is 74
Thus,
74 gram (1 mole) of Ca(OH)_2 reacts with 162 gram of Ca(HCO_3)_2
Thus, 1 gram of Ca(OH)_2 reacts with = \frac{162}{74} gram of Ca(HCO_3)_2
22.2 gram of of Ca(OH)_2 reacts with = \frac{162}{74}\times 22.2=48.6 gram of Ca(HCO_3)_2
Thus,'
50 litres of water contains 48.6 gram of Ca(HCO_3)_2
1 litre of water will contain =\frac{48.6}{50}=0.972 gram of Ca(HCO_3)_2
Hope this answer is helpful.