SOLUTION: How do I set this up and can you show me how to do it with the answer?
A chemist needs 140 milliliters of a 35% solution but has only 23% and 65% solutions available. Find how
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Question 360158: How do I set this up and can you show me how to do it with the answer?
A chemist needs 140 milliliters of a 35% solution but has only 23% and 65% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the amount of 23% solution. Then 
represents the amount of 65% solution.
ml
represents the amount of pure whatever it is that is contained in the 23% solution.
)
ml
represents the amount of pure whatever in the 65% solution.
\ =\ 49)
ml
represents the amount of pure whatever in the resulting 140 ml of 35% solution, so:
\ =\ 49)
Solve for . Then compute .
John
My calculator said it, I believe it, that settles it
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