Question

Calculate the concentration in terms of mass by volume percentage of the solution containing, $3\text{g}$ of potassium chloride in $75\text{ml}$ of potassium chloride $\left(KCl\right)$ solution.

• A. $4\%$
• B. $6\%$
• C. $8\%$
• D. $20\%$

Answer 1

The correct option is A $4\%$

Mass of solute $=3\text{g}$
Volume of solution $=75\text{ml}$
Mass by volume % =
$\left(\frac{Massofsolute}{Volumeofsolution}\right)\times 100=3/75\times 100=4\%$