SOLUTION: For an experiment, a student requires 200 milliliters of a solution that is 12 % NaCl (sodium chloride). The storeroom has only solutions that are 15 % NaCl and 5 % NaCl. How many

Question 1047076: For an experiment, a student requires 200 milliliters of a solution that is 12 % NaCl (sodium chloride). The storeroom has only solutions that are 15 % NaCl and 5 % NaCl. How many milliliters of each available solution should be mixed to get 200 milliliters of 12 % NaCl?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = ml of 5% NaCl solution
Let = ml of 15% NaCl solution
----------------------------------
(1)
(2)
----------------------------------
(2)
(2)
(2)
-------------------------
Subtract (1) from (2)
(2)
(1)
---------------------

and
(1)
(1)
(1)
---------------------
60 ml of 5% NaCl solution is needed
140 ml of 15% NaCl solution is needed
-----------------------------------
check:
(2)
(2)
(2)
(2)
(2)
OK
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