Question

in 90g of 20% of aqueous Salt solutions 10g more water is added then find the final concentration of the solution

Answer 1

Given,

Initial mass of solution = 90 grams

Solute percentage = 20%

Water added = 10 grams

For calculating,the final concentration of the solution,we have to calculate the mass of the final solution and mass of the solute.

Mass of solute = 90 × 20/100 = 18 grams

Mass of solvent = 90 - 18 = 72 grams

Mass of final solution = 90+10 = 100 grams

Final concentration of the solution (w/w) = 100 × mass of solute/final mass of solution = 100 × 18/100 = 18%

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