SOLUTION: An auto mechanic has 300mL of batter acid solution that is 60% acid. He must add water to this solution to dilute it so that it is only 45% acid. How much water should he add?

Question 133896: An auto mechanic has 300mL of batter acid solution that is 60% acid. He must add water to this solution to dilute it so that it is only 45% acid. How much water should he add?
Answer by ptaylor(2198) (Show Source): You can put this solution on YOUR website!

Let x=amount of water that needs to be added
Now we know that the pure acid in the water (0) plus the pure acid in the 60% solution (0.60*300) has to equal the amount of pure acid in the final mixture (0.45(300+x))
So our equation to solve is:
0.60*300=0.45(300+x) simplify
180=135+0.45x subtract 135 from each side
180-135=0.45x
0.45x=45 divide both sides by 0.45
x=100ml------------------amount of water that needs to be added
CK
0.60*300=0.45*400
180=180

Hope this helps---ptaylor

RELATED QUESTIONS
An auto mechanic has 300mL of battery acid solution that is 60% acid. he must add water... (answered by stanbon)

An auto mechanic has 600g of battery acid solution that is 60% acid. he must add water to (answered by Theo)

How much water must be added to 300ML of a 60% acid solution in order to dilute it to a... (answered by stanbon,modi.kk91)

a chemist has one solution that is 60 mL of a solution that is 50% acid. How much water... (answered by josgarithmetic)

You have 15 L of 24% acid solution. How much water should you add in order to dilute the... (answered by lwsshak3)

You have 15L of 24% acid solution. How much water should you add in order to dilute the... (answered by josmiceli,stanbon)

You have 15L of 24% acid solution. How much water should you add to dilute the solution... (answered by richwmiller)

A pharmacist has 6 liters of an 8% boric acid solution. How much water should he add to... (answered by Edwin McCravy,josmiceli)

if a auto technician has 20 ounces of battery acid that is 55% acid how many ounces of... (answered by josgarithmetic)