Question

The concentration of a solution is 8%(w/w) and 10%(w/v). Calculate density (in g/ml) of solution.

Answer 1

Concentration $\left(w/w\right)$ is $8\%$.

This means that $8g$ of the solute is present in $100g$ of solution.

Concentration $\left(w/v\right)$ is $10\%$.

$\because$ weight of solute is $8g$.

$\therefore$ Volume of solution $=8\times 10=80mL$

Therefore,

Density of solution $\left(d\right)=\frac{\text{mass of solution}}{\text{volume of solution}}$

$\Rightarrow d=\frac{100}{80}=1.25g/mL$

Hence the density of solution will be $1.25g/mL$.