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  4. 20 ml of N/10 HCl, 30 ml of N/15 HNO3 and 40 ml of N H2SO4 are mixed. What will be normality of the resulting solution ?

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Q. $20\, ml$ of $N/10 \,HCl$, $30\, ml $ of $N/15 \,HNO_{3}$ and $40\, ml$ of $N H_{2}SO_{4}$ are mixed. What will be normality of the resulting solution ?

UP CPMTUP CPMT 2009

Solution:

As we know from the law of equivalence that
$N_{1}V_{1}+N_{2}V_{2}+N_{3}V_{3}=N_{R}V_{R}$
$20\times \frac{1}{10}+30\times \frac{1}{15}+40\times1$
$=N_{R}\times90$
$N_{R}=\frac{44}{90}$