Question

Larry mixed 15 grams of salt with 210 grams of a 5% salt solution in water. What is the percent of salt in his new solution?

Answer 1

total mass of salt in the 2100 grams of solution  = 15 + 0.05 * 210  =     25.5  grams

as a percent this is    (25.5 * 100) / 210  =   12.14% Answer