A chemist has a solution that is 20% hydrochloric acid (hcl) and a solution that is 50% hcl. how much of each solution should be mixed to obtain 300 cubic centimeters (cc) of a solution that is 30% hcl?
Please examine explanation
First acid (20%), amount V (which is volume (in cc))
Second acid (50%), amount
Now compute the amounts (volumes)
The rest (100 cc) should be taken from 50% HCl solution.
Your answer is 200 cc from 20% HCl and 100 cc from 50% HCl solution will do.