Question

A solution contains 15g of sodium chloride in 285g of water.Calculate concentration of solution.
Ans:5 %

Answer 1

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Answer 2

Concentration of solution is 5 %

Step 1:

Mass of the solute (sodium chloride) = 15 g

Mass of the solvent (water) = 285 g

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

= 15 + 285 = 300 g

Step 2:

Concentration (mass by mass percentage) =

⇒   $\frac{massofsolute}{massofsolution}$  ×  100

⇒   $\frac{15}{300}$  ×  100

⇒  5 %

Therefore, the concentration of the solution is 5%

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