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Grade: 12th pass
        
RH2 (ion exchange resin) can replace Ca+2 in hard water as RH2+Ca+2----------RCA+2H+ one litre of hard water after passing through RH2 has PH=2.Hence,hardness (in ppm) of Ca+2 is
1.200
2.100
3.50
4.125(please sir solve this question. It is from All India Aakash Test Series)
one year ago

Answers : (1)

Arun
24475 Points
							
Dear student
 
[H+] = 10^-2
 
Ca2+ = 10^ – 2  /2
 
 = 40 * 10^-2  / 2
 
0.2 g/l
 
Hardness = 0.2 * 10^6 / 1000
 
 = 200 ppm
one year ago
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