Question

in 90 g of 20% (w/w) aqueous salt solution 10 g more water is added calculate the final concentration (w/w%) of the solution
full answer on sheet plz​

Answer 1

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Given:

The initial mass of solution = 90 gm

The initial mass percentage of 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 solution = 90 × 20 / 100 = 18 gm

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

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

⇒ The final mass percentage of the solution = 18 %

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

Answer 2

Hey Muskaan

Here is your answer

The initial mass of solution = 90 gm

The initial mass percentage of 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 solution = 90 × 20 / 100 = 18 gm

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

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

⇒ The final mass percentage of the solution = 18 %

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

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