MCQ
If $1\,M$ and $2.5\,litre$ $NaOH$ solution is mixed with another $ 0.5\,M$ and $3\,litre$ $ NaOH$ solution, then molarity of the resultant solution will be ........ $M$.
- A$1.0$
- ✓$0.73$
- C$0.80$
- D$0.50$
✓
Answer
Correct option: B.
$0.73$
b
(b) $(2.5 \times 1 + 3 \times 0.5) = {M_3} \times 5.5$
(b) $(2.5 \times 1 + 3 \times 0.5) = {M_3} \times 5.5$
or $2.5 + 1.5 = {M_3} \times 5.5$ or ${M_3} = \frac{4}{{5.5}} = 0.73\,M$
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