Question

The mass percentage of sodium chloride in 46g of water is 8%, the mass of it present in the solution is *
1 point
10g
5g
4g
6g

​

Answer 1

Answer:

5g is the correct answer.........

Answer 2

Given:-

→ Mass of water = 46g

→ Mass percent of the solution = 8%

To find:-

→ Mass of Sodium Chloride present in the

solution.

Solution:-

Let the required mass of Sodium Chloride. be 'x' grams .

It is clear that Sodium Chloride is solute and water is solvent. We are given with the mass of solvent and mass percent of solution. So firstly, let's calculate the total mass of the solution.

Mass of solution :-

= Mass of solute + Mass of solvent

= (x + 46)g

Mass percent of a solution :-

= Mass of solute/Mass of solution × 100

Substituting values, we get :-

=> x/(x + 46) × 100 = 8

=> 100(x) = 8(x + 46)

=> 100x = 8x + 368

=> 100x - 8x = 368

=> 92x = 368

=> x = 368/92

=> x = 4g

Thus, mass of Sodium Chloride present in the solution is 4g .