SOLUTION: a parmasists wishes to mix a solution that is 7% minoxidil. she has on hand 80 ml of a 4% solution and wishes to add some 9% solution to obtain the desired 7% solution. how much 9%
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Question 490075: a parmasists wishes to mix a solution that is 7% minoxidil. she has on hand 80 ml of a 4% solution and wishes to add some 9% solution to obtain the desired 7% solution. how much 9% solution should she add? Found 2 solutions by stanbon, josmiceli:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! a pharmasist wishes to mix a solution that is 7% minoxidil.
she has on hand 80 ml of a 4% solution and wishes to add some 9% solution to obtain the desired 7% solution.
how much 9% solution should she add?
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Equation:
mino + mino = mino
0.04*80 + 0.09x = 0.07(80+x)
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Multiply thru by 100 to get:
4*80 + 9x = 7*80 + 7x
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2x = 3*80
x = 120 ml (amt of 9% solution needed)
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Cheers,
Stan H.
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You can put this solution on YOUR website! Let = ml of the 9% solution she needs to add
given: ml of minoxydyl in 4% solution = ml of minoxydyl in 9% solution
In words:
( ml of minoxydyl in final solution)/ (total ml of final solution) = 7%
She needs to add 120 ml of 9% solution
check answer:
OK
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