The mass percentage of a component of solution is defined as:

$=\frac{\text{Mass of component in the solution}}{\text{Total mass of solution}}×100$

The correct answer is Option (2) → $=\frac{\text{Mass of component in the solution}}{\text{Total mass of solution}}×100$

The correct formula for calculating the mass percentage (w/w) of a component in a solution is:

Mass % of a component = $\frac{\text{Mass of component in the solution}}{\text{Total mass of solution}} \times 100$

Key Details

• Total Mass of Solution: This is the sum of the masses of all components (solutes and the solvent) in the mixture.
• Unitless Value: Since it is a ratio of two masses, the final percentage is a dimensionless quantity.
• Application: This measurement is commonly used in industrial chemical applications, such as specifying the concentration of bleach or commercial acids.