a solution is prepared by addition of 10g of salt in 100g water. to make the concentrarion of the solution 15%(w/w), the amount of salt to the solution is approximately what
% of solution to be prepared = 15%
To find: Amount of salt to the solution
Solve: Amount of solvent = 100 g
Suppose "x" g of salt is dissolved in water.
Mass by mass % = (mass of salt / mass of solution) X 100
15 = (x / 100 + x) X 100
1500 + 15 x = 100 x
1500 = 85 x
x = 1500 / 85
x = 17.65 g
To prepare 15% solution amount of salt to be added is 17.65 g.