SOLUTION: What quantity of 75 percent acid solution must be mixed with a 30 percent solution to produce 135 mL of a 50 percent solution?

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Question 650807: What quantity of 75 percent acid solution must be mixed with a 30 percent solution to produce 135 mL of a 50 percent solution?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

What quantityhighlight%28x%29 of 75 percent acid solution must be mixed with a 30 percent solution 

to produce 135 mL of a 50 percent solution? 

   acid  = acid

 .75x+%2B+.30%28135-x%29+=+.50%2A135

                 .45x = .20·135

                    x = .20·135/.45