Question

HOW MUCH WATER SHOULD BE ADDED TO 15g of salt to obtain 15% salt solution?

Answer 1

15% salt soln. implies that 100g of soln. must contain 15g salt.
Therefore, mass of salt in soln. =15g
Hence ,
mass of water that must be added=100-15=85g

Is the answer correct?

Answer 2

Answer:

Explanation:

The mass by mass percentage of a solution is given by the following relation

where mass of solution = mass of solute + mass of solution

Let the mass of water be a grams.

So,

15 = [15 / (15 + a)] X 100

Solving for a, we get

a = (100 - 15)g = 85g

HAVE a great day