SOLUTION: A 30% solution of barium chloride is mixed with 10 grams of water to form a 20% solution. How many grams of the original solution did we start with?
A)10
B)15
c)20
D)25
E)30
Hi,
A 30% solution of barium chloride is mixed with 10 grams of water to form a 20% solution
Let x represent grams of solution started with
Note: Using %Water = %Water
.70x + 10 = .80(x+10)
(10-8)/.1 = x = 20, the grams of solution started with