
Interpretation: The normality of nitric acid ( HNO3 ) needs to be determined.
Concept introduction: At neutralization point of a reaction for mono-acidic acid and mono-basic base,
number of moles of acid=number of moles of of baseN1V1=N2V2
N1=concentration of acid in normality.
V1= volume of the acid.
N2=concentration of base in normality.
V2= volume of the base.

Answer to Problem 59A
The normality of nitric acid ( HNO3 ) is 0.1925 N.
Explanation of Solution
The balanced neutralization reaction: Ca(OH)2+ 2HNO3 → Ca(NO3)2+ 2H2O
So, 1 mol of dibasic Ca(OH)2 reacts with 2 moles of mono-acidic HNO3 and hence,
2×number of moles of Ca(OH)2=number of moles of of HNO32×N2V2=N1V1
Here,
N1=concentration of acid=?
V1= volume of the acid=10.0 mL
N2=concentration of base in=3.5×10−2 N
V2= volume of the base=27.5 mL
2×(3.5×10−2 N)×(27.5 mL)=N1×(10.0 mL)N1=1.92510.0 NN1=0.1925 N
The normality of nitric acid ( HNO3 ) is 0.1925 N.
Chapter 15 Solutions
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