Question

how much salt to be dissolved in 150g of water so that concentration of solution is 250 % ?

Answer 1

Explanation:

percent blurf = quantity of blurftotal quantity×100

So for percent by mass, both quantities are expressed as mass, and it’s the mass of NaCl divided by the total mass of the solution, then times 100%

mass % NaCl = 25 g150 g+25 g×100

mass %NaCl = 14.3%