SOLUTION: A lab contains 24 ounces of iodine solution of strength 15%. how much pure iodine would you mix with it to get an iodine solution of strength 25%?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: A lab contains 24 ounces of iodine solution of strength 15%. how much pure iodine would you mix with it to get an iodine solution of strength 25%?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 365490: A lab contains 24 ounces of iodine solution of strength 15%. how much pure iodine would you mix with it to get an iodine solution of strength 25%?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

Let x represent the amount of pure iodine(that would be an 100% solution)

question states***

.15*24 + 1.00x = .25(24oz + x )

solve for x

.75x = .10*24oz

x = 3.2oz is the amount of oure iodine needed



checking our answer

.15*24 + 1.00x = .25(24oz + x )

3.6    + 3.2   = 6.8