Question 866354: How much water must be added to 120 mL of a 35% alcohol solution to dilute it to a 25% alcohol solution? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! --- percent ---------------- Amount
Alcohol I 35 ---------------- 120 ml
water 0 ---------------- x ml
Mixture 25 ---------------- 120 + x ml
35 * 120 + 0 x = 25 ( 120 + x )
4200 + 0 x = 3000 + 25 x
0 x -25 x = -4200 + 3000
-25 x = -1200
/ -25
x = 48 ml water
