SOLUTION: Can you please help me solve this? A chemist wants to mix distilled water with a 75% solution of sulfuric acid to produce a 60% solution. If 3 gallons of distilled water is used, h

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Question 230402: Can you please help me solve this? A chemist wants to mix distilled water with a 75% solution of sulfuric acid to produce a 60% solution. If 3 gallons of distilled water is used, how much of 75% is needed?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A chemist wants to mix distilled water with a 75% solution of sulfuric acid to produce a 60% solution.
If 3 gallons of distilled water is used, how much of 75% is needed?
:
let x = amt of 75% solution (use the decimal equiv)
:
A simple "amt of acid" equation
.75x = .60(x+3)
.75x = .6x + 1.8
.75x - .6x = 1.8
.15x = 1.8
x = 1.8%2F.15
x = 12 gal of 75% solution required
:
:
Check to see if equality reigns here
.75(12) = .60(12+ 3)
9 = 9