The volumes of two HCl solutions A(0.5 , M) and B(0.1 , M) to be … - Vidyadip

MCQ

The volumes of two $HCl$ solutions $A(0.5\, M)$ and $B(0.1\, M) $ to be mixed for preparing $2\,L$ of $0.2\, M \,HCl$ are

✓
$0.5 \,L$ of $A + 1.5\, L$ of $B$
B
$1.5\, L$ of $A + 0.5\, L$ of $B$
C
$1\, L$ of $A + 1\, L$ of $B$
D
$0.75\, L$ of $A + 1.25\, L$ of $B$

✓

Answer

Correct option: A.

$0.5 \,L$ of $A + 1.5\, L$ of $B$

a
$\mathrm{M}_{1} \times \mathrm{V}_{1}+\mathrm{M}_{2} \mathrm{V}_{2}=\mathrm{M}_{3} \mathrm{V}_{3}$

$0.5 \times V_{1}+0.1\left(2-V_{1}\right)=0.2 \times 2$

$0.4\, \mathrm{V}_{1}=0.4-2$

${\mathrm{V}_{1}=\frac{0.2}{0.4}=0.5 \,\mathrm{L}}$

${\mathrm{V}_{2}=1.5\, \mathrm{L}}$

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