Solutions Question 5
Question 5 - 2024 (29 Jan Shift 1)
A solution of $H _2 SO _4$ is $31.4 \% H _2 SO _4$ by mass and has a density of $1.25 g / mL$. The molarity of the $H _2 SO _4$ solution is ________ $M$ (nearest integer)
[Given molar mass of $H _2 SO _4=98 g mol^{-1}$ ]
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Answer (4)
Solution
$M=\frac{n _{\text {solute }}}{V} \times 1000$
$=\frac{\left(\frac{31.4}{98}\right)}{\left(\frac{100}{1.25}\right)} \times 1000$
$=4.005 \approx 4$
