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Molarity

If 15% w/w ...

Question

If $15 %$ w/w $H_{2} {S O}_{4}$ solution having density $1.2 g m / {c m}^{3}$ then Calculate its molarity.

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Solution

consider 100ml solution ,

total mass $= 100 \times 1.2 = 120 g$

mass of $H_{2} S O_{4} = 120 \times \frac{15}{100} = 18 g m$

$∴$ molarity $= \frac{18 / 98}{100} \times 1000 = 1.83 M$

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