SOLUTION: A gallon of Clorox bleach is labeled “5.25% sodium hypochlorite by weighs 8.3 pounds, then how many ounces of sodium hypochlorite must be added so that the bleach will be 13% sodiu

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Question 1122722: A gallon of Clorox bleach is labeled “5.25% sodium hypochlorite by weighs 8.3 pounds, then how many ounces of sodium hypochlorite must be added so that the bleach will be 13% sodium hypochlorite? Round your answer to four decimal places if necessary.
Found 2 solutions by ankor@dixie-net.com, josmiceli:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A gallon of Clorox bleach is labeled “5.25% sodium hypochlorite by weighs 8.3 pounds,
then how many ounces of sodium hypochlorite must be added so that the bleach will be 13% sodium hypochlorite?
Round your answer to four decimal places if necessary.
:
Change 8.3 lb to oz: 16 * 8.3 = 132.8 oz
let a = amt of this stuff required to accomplish this
:
(.0525*132.8) + a = .13(132.8+a)
6.972 + a = 17.264 + .13a
a - .13a = 17.264 - 6.972
.87a = 10.292
a = 10.292%2F.87
a = 11.8299 oz of the stuff

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+.0525%2A8.3+=+.43575+ pounds of sodium hypochlorite
+%28+.43575+%2B+x+%29+%2F+%28+8.3+%2B+x+%29+=+.13+
+.43575+%2B+x+=+1.079+%2B+.13x+
+.87x+=+.64325+
+x+=+.73937+ pounds
+16x+=+11.82988+
11.8299 ounces should be added
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Check the math