SOLUTION: HOW MUCH WATER DO I ADD TO MAKE A 10% SOLVENT INTO A .5% SOLVENT?

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Question 747806: HOW MUCH WATER DO I ADD TO MAKE A 10% SOLVENT INTO A .5% SOLVENT?
Found 2 solutions by josmiceli, Alan3354:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +w+ = units of water to be added
Suppose you have +10+ units of 10% solvent to start with ( plug in your own number )
+.1%2A10+=+1+ unit of solvent to start with
+1+%2F+%28+w+%2B+10+%29+=+.005+
+1+=+.005%2A%28+w+%2B+10+%29+
+1+=+.005w+%2B+.05+
+.005w+=+.95+
+w+=+190+
190 units of water need to be added
hope this helps

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
HOW MUCH WATER DO I ADD TO MAKE A 10% SOLVENT INTO A .5% SOLVENT?
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It depends on how much 10% solvent you start with.