Question

A solution contains 50 gms of NaCl in 400 gms of water. Calculate the
concentration in terms of mass by mass percentage of the solution.​

Answer 1

$\LARGE{ \underline{\underline{ \orange{ \sf{Required \: answer:}}}}}$

GiveN:

• Mass of common salt = 50 g

• Mass of the water = 400 g

To FinD:

• Mass percentage of the Solution?

Step-wise-Step Explanation:

Generally we are required to find the mass percentage in order to determine the concentration of the solution in terms of mass, volume or mass & volume.

Mass percentage can be calculated by:

$\cdot{ \boxed{ \rm{Mass \: \% = \frac{Mass \: of \: solute}{Mass \: of \: solution} \times 100}}}$

First of all,

⇒ Mass of the sol. = Mass of solute + Mass of solvent

⇒ Mass of the sol. = 50 g + 400 g

⇒ Mass of the sol. = 450 g

Plugging the given values:

⇒ Mass % of the Sol. = 50 g / 450 g × 100

⇒ Mass % of the Solution = 100/9 %

⇒ Mass % of the Solution = 11.12 %

Hence the required concentration of salt in its solution in terms of its mass is 11.12%

Note:

• As the mass of the solvent is given here, we have add the mass of solute and solvent to get the mass of solvent.

Answer 2

Explanation:

Given :

• Mass of solute = 50g

• mass of solvent = 400g

To Find :

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

Solution :

mass of solution = 50 + 400

mass of solution = 450g

mass by mass = mass of solute / mass of solution × 100

Substitute all values :

mass by mass = 50/450 × 100

= 100/9

= 11.1%

Hence mass by mass % = 11.1%