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
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
