SOLUTION: How many liters (L) of a 10% silver iodide solution must be mixed with 7 L of a 4% silver iodide solution to get a 6% solution?

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Question 41399: How many liters (L) of a 10% silver iodide solution must be mixed with 7 L of a 4% silver iodide solution to get a 6% solution?
Answer by Paul(988) About Me  (Show Source):
You can put this solution on YOUR website!
Let x be the amount of solution:
EQUATIONL
0.1x+0.04(7-x)=0.06(7)
0.1x+0.28-0.04x=0.42
0.06x=0.14
x=2.3
7-2.3=4.7
Hence, about 2.3 L of 10% should be added and about 4.7 of 4% should be added.
Paul.