SOLUTION: Charles is doing an experiment that calls for a 40% solution of copper sulfate. He has 60 mL of a 25% solution. How many milliliters of a 70% solution should Charles add to obtain
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Question 536485: Charles is doing an experiment that calls for a 40% solution of copper sulfate. He has 60 mL of a 25% solution. How many milliliters of a 70% solution should Charles add to obtain the required 40% solution? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = ml of 70% solution needed
given: = ml of copper sulfate in 70% solution ml of copper sulfate in 25% solution
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In words:
( final ml of copper sulfate ) / ( final ml of solution ) = 40%
30 ml of 70% solution are needed
check:
OK
