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  4. 25 mL of 3 MHNO 3 is mixed with 75 mL of 4 MHCl, the molarity of the resulting solution is

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Q. $25\, mL$ of $3 \, MHNO _3$ is mixed with $75\, mL$ of $4\, MHCl$, the molarity of the resulting solution is

JIPMERJIPMER 2015Solutions

Solution:

$M_1 V_1+M_2 V_2=M_R\left(V_1+V_2\right)$
$3 \times 25+4 \times 75=M_R(25+75)$
$75+300=M_R(100)$
$M_R=375 / 100$
$M_R=3.75 \,M$