Question

35. 40 ml N/10 HCl and 60 ml N/20 KOH are mixed together.
The normality of the acid or base left will be :
(1) 0.02 N
(2) 0.03 N
(3) 0.04 N
(4) 0.01 N
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Answer 1

Answer:

Explanation:Normality of HCl (say N1) = 0.1N(1/10)

Normality of KOH(say N2) = 0.05N (1/20)

Volume of HCl(say V1)=40ml

Volume of KOH(say V2)=60ml

Normality of the resulting solution =( | N1V1-N2V2| )/V1 +V2

Normality = (| 4 - 3 |)/40+60

=1/100

=0.01N

The solution will be somewhat acidic because millimoles (NV) of HCl is greater than that of KOH.