Question

30g of salt is dissolved in 100 g of water. Calculate the concentration of the solution formed in mass-by-mass percentage?

• A. 33.07 %
• B. 30 %
• C. 26.47 %
• D. 23.07 %

Answer 1

The correct option is D 23.07 %

Given:
Mass of salt (solute) = 30 g
Mass of water (solvent) = 100 g

To find:
Concentration of solution (in m/m %)

Solution:

m/m % = $\frac{Massofsolute}{Massofsolution}\times 100$

Mass of solution = Mass of solute + mass of solvent

Mass of solution = 30 + 100 = 130 g

m/m % = $\frac{30}{130}\times 100$

= 23.07 %

Hence, mass-by-mass percentage of the given solution is 23.07 %.