SOLUTION: THREE HUNDRDE MILLILITES FO A 5% NAC1 SOLUTION IS NEEDED. HOWEVER ONLY A 10% SOLUTION OF THE SODIUM CHLORIDE IS IN STOCK . HAOW MANY MILLILITER FO THE 10 % naci are need to make 30

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Question 431391: THREE HUNDRDE MILLILITES FO A 5% NAC1 SOLUTION IS NEEDED. HOWEVER ONLY A 10% SOLUTION OF THE SODIUM CHLORIDE IS IN STOCK . HAOW MANY MILLILITER FO THE 10 % naci are need to make 300 ml of the 10 solution
Found 3 solutions by mananth, ikleyn, josgarithmetic:
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
percent ---------------- quantity
Nacl 10 ---------------- x ml
water 0 ---------------- 300 - x ml
Total 5.00% ---------------- 300

10x+0(300-x)=5* 300

10x= 1500

/10
x=150 ml 10.00%
Balance water

Answer by ikleyn(53427) About Me  (Show Source):
You can put this solution on YOUR website!
.
THREE HUNDRDE MILLILITES FO A 5% NAC1 SOLUTION IS NEEDED. HOWEVER ONLY A 10% SOLUTION OF THE SODIUM CHLORIDE IS IN STOCK .
HAOW MANY MILLILITER FO THE 10 % naci are need to make 300 ml of the 10 solution
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To those who will read this post later.

The creator of this problem confused himself with the numbers.
Therefore, do not consider this "problem" too seriously.



Answer by josgarithmetic(39702) About Me  (Show Source):
You can put this solution on YOUR website!
A good composing of the problem could be this:

Three hundred milliliters of 5% NaCl solution is needed, but 10% concentration is in stock. How many milliliters of the 10% solution should be used?