Question

A solution contains 20 g of common salt in 300 g of water. Calculate the concentration in terms of mass by mass percentage of the solution.

Answer 1

Explanation:

Given,

common salt=20g

water=300g

if we put mass by mass percentage formula...

--> mass of solute/mass of solution×100

= 20/300×100

= 20/3

= 6.66%

This will be the correct concentration of solution....

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Answer 2

Given:

Mass of common salt = 20g

Mass of water = 300g

To find:

Calculate the concentration in terms of mass by the mass percentage of the solution.

Solution:

Here common salt is given as the Solute, and its mass is = 20g

Here water is given as the Solvent, and its mass is  = 300g

We know the formula to calculate the concentration in terms of mass by the mass percentage of the solution is given by

⇒ Mass Percent = Mass of Solute/Mass of Solution×100%

Hence, Total mass of solution = Mass of solute + Mass of the solvent

= 20g + 300g

= 320g

Therefore, the concentration in terms of mass by the mass percentage of the solution is

⇒ Mass Percent = Mass of Solute / Mass of Solution×100%

⇒ 20g / 320g × 100%

⇒ 100/16 %

⇒ 6.25 %

Hence, the concentration in terms of mass by the mass percentage of the solution is =  6.25 %