Question

A solution was prepared is dissolving 20g of NaoH in 100g of water. calculate the mass percentage of solute.​

Answer 1

Explanation:

First find the total mass of the solution:

total mass = 20g sodium hydroxide + 100 g water

total mass = 120g

therefore mass percentage=

20/120*100=16.66%

Answer 2

The mass percentage of the solute is approximately 16.6%.

• Given data :

Mass of the NaOH in the solution is 20 grams.

Mass of the water in the solution is 100 grams.

• Now,in this solution,the solute is absolutely the NaOH and the solvent is absolutely the water.

• At first, we have to calculate mass of the total solution by using the following mathematical formula :

Mass of the solution = Mass of solute + Mass of solvent

= 20+120

= 120 grams

• At last,we have to calculate the mass percentage of the solute by using the following mathematical formula :

= 100 × mass of solute/mass of the total solution

= 100 × 20/120

= 16.6%

So,the approximate mass percentage of the solute is 16.6% (answer)