Question

A solution of `Na_(2)S_(2)O_(3)` is standarised idometrically against 0.167 gram of `KBrO_(3)` this process required 50 mL of the `Na_(2)S_(2)O_(3)` solution. What is the normality of the `Na_(2)S_(2)O_(3)`?
A. 0.2 N
B. 0.12 N
C. 0.72 N
D. 0.02 N

Answer 1

Correct Answer - B
Equivalent weight of `KBrO_(3)(167)/(6(n-"factor"))" n-factor"=6`
`N_(Na_(2)S_(2)O_(3))=(0.167)/(167)xx6xx(1)/(0.05)=0.12N`