The solubility of a solute is 8. If the density of solution is $1.364 g m l^{- 1}$ , find the weight-volume percentage.

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Solution

$S = 8 = \infty$ , $8 g$ of solute in $100 g$ of solvent
mass of solution $= 108 g$
density $= \frac{m a s s}{v o l u m e}$ , Volume $= 79.18$ ml
$∴$ % weight-volume $= \frac{8 \times 1000}{79.18} = 101.03 g / L$
with increase in temperature, Kinetic energy of the molecule increases.
In solid, it allows the solvent molecules to mole effectively break apart hence solubility increases.
Where as in gases, with higher kinetic energy, it cause motion in gas, which break the intermolecular forces and the gas molecule escape from solution decreasing solubility.

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