What amount of a 75% acid solution must be mixed with a 25% solution to produce 500 mL of a 60% solution?
+36916 Total solution will be 500 ml
500 ml of 60% = 500 (.6) = 300 ml of 100%
75 % solution is x .75 x is amount
25 % solution .25 (300-x)
.75x + .25 (300 - x) = 300 Solve for 'x' = amount of 75% solution to use
