Question

is 90 g of 20percent percent w/w aqueous salt solution 10 g more water is added . calculate the final concerteration
percent w/w of solution
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Answer 1

Given:

The initial mass of solution, w = 90 gm

The initial mass % of the aqueous salt solution = 20 %

The mass of water added = 10 gm

To Find:

The final concentration of the solution.

Calculation:

- The mass of salt in the given solution = 90 × 20 / 100 = 18 gm

- The final mass of the solution = 90 + 10 = 100 gm

- The final mass % of the solution = (18 / 100) × 100

⇒ The final mass % of the solution = 18 %

- So, the final concentration of the solution is 18 % (w/w)