Question 451520
    How many milliliters of water must be added to 10 milliliters of a 30% sulfuric acid solution to make a 15% sulfuric solution?
.
Let x = milliliters of water
then
.30(10) + 0(x) = .15(10+x)
3 = 1.5+.15x
1.5 = .15x
10 milliliters = x