SOLUTION: How many cubic centimeters of pure hydrochloric acid should be added to 20 cubic centimeters of a 30% solution of hydrochloric acid to obtain a 50% solution?

Question 998261: How many cubic centimeters of pure hydrochloric acid should be added to 20 cubic centimeters of a 30% solution of hydrochloric acid to obtain a 50% solution?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
How many cubic centimeters of pure hydrochloric acid should be added to 20 cubic centimeters of a 30% solution of hydrochloric acid to obtain a 50% solution?
let x=amt of pure hydrochloric acid to add
30%20+x=50%(30+x)
6+x=15+.50x
.50x=9
x=18
How many cubic centimeters of pure hydrochloric acid should be added? 18
RELATED QUESTIONS
How many cubic centimeters of pure hydrochloric acid should be added to 20 cubic... (answered by Alan3354)

How many cubic centimeters of pure hydrochloric acid should be added to 20cc of a 30%... (answered by nerdybill)

How many cubic centimeters (cc)of a 25% solution should be added to 10 cubic centimeters... (answered by haileytucki)

how many cubic centimeters of a 25% antibiotic solution should be added to 10 cubic... (answered by josgarithmetic)

How many cubic centimeters of a 20% saline solution should be added to 20 cubic... (answered by ankor@dixie-net.com)

one solution is 20% acid and another is 12%. How many cubic centimeters of each solution... (answered by checkley77)

How many cubic centimeters of a solution that is 20% acid and of another solution that is (answered by ikleyn)

how many cubic centimeters of a 25% antibiotic solution should be added to 10 cubic... (answered by Boreal)

A chemist has 30 cc of a 12% solution of acid. He wishes to add enough water to make a... (answered by ankor@dixie-net.com)