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You need a 35% alcohol Solution on hand you have a 270 mL of a 30% alcohol mixture you also have 80% alcohol mixture how much of the 80% mixture will you need to obtain the desired solutionyou will need
_____mL of the 80% solution
_____mL of the desired 35% solution​

 Feb 6, 2021
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 Your question does not say how much of the 35% solution you need, so there is a LOT of answers....

   I will assume you want to use ALL of the 30 %  and need to know how much 80% to add to it to get a 35% solution.

 

alcohol in   = alcohol out

.8(x) + .3(270) = .35 (x+270)

.8x + 81 = .35x + 94.5

.45 x = 13.5

x = amount of 80% to add to 270 of 30% to get 35% = 30 ml

 

total end solution of 35% =   270 + 30 = 300ml

 Feb 6, 2021

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