SOLUTION: for a certain experiment, a student requires 100 cubic centimeters of a solution that is 8% HCl, the storeroom has only solutions that are 15%HCl and 5% HCl, How many cubic centime

Question 1132315: for a certain experiment, a student requires 100 cubic centimeters of a solution that is 8% HCl, the storeroom has only solutions that are 15%HCl and 5% HCl, How many cubic centimeters of each available solution should be mixed to get 100 cubic centimenters of 8% HCl.
Found 2 solutions by josgarithmetic, greenestamps:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
x of the 15%
100-x of the 5%

Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

For a quick non-algebraic solution to this problem (and a huge number of similar problems), try this....

(1) 8% is 3/10 of the way from 5% to 15% (think of it on a number line -- 15-5 = 10; 8-5 = 3 --> 8 is 3/10 of the way from 5 to 15).

(2) That means 3/10 of the mixture must be the 15% solution.

ANSWER: 3/10 of 100cc = 30cc of 15%; so 70cc of 5%.
RELATED QUESTIONS
For a certain experiment, a student requires 300 ml of a solution that is 13% HCl... (answered by ankor@dixie-net.com)
For an experiment, a student requires milliliters of a solution that is NaCl (sodium... (answered by richard1234)
For an experiment, a student requires 150 ml of a solution that is 8% NaCl. The storeroom (answered by Alan3354)
For an experiment, a student requires 200 milliliters of a solution that is 8% NaCl... (answered by Alan3354,stanbon)
For an experiment, a student requires 200 milliliters of a solution that is 12 % NaCl... (answered by josmiceli)
A laboratory has 60 cubic centimeters (cm^3) of a solution that is 40% HCl acid. How many (answered by josgarithmetic,greenestamps)
A class of nursing students will perform an experiment wherein they will need a solution (answered by stanbon)
A laboratory has 60 cubic centimeters (cm^3) of a solution that is 40% HCl acid. How many (answered by josgarithmetic,ikleyn)
Hello! Would anyone please help with the following word-problem that requires the... (answered by Nate)