Problema Solution
a solution contains 5% salt. How much water should be added to 90 ounces of this solution to make 4.5% solution?
Answer provided by our tutors
5% = 0.05 , 4.5% =0.045
Mass of the salt is 90*0.05 = 4.5 ounces
Because the mass of salt remains at 4.5 ounces
=> In a 4.5% solution, we need 4.5/0.045 = 100 ounces
=> Need to add 100-90 = 10 ounces water to make 4.5% solution