Question 1124590: If you have 1.75L of an 18% alcohol solution, how much pure alcohol must you add in order to increase the concentration to 60%? Found 2 solutions by josgarithmetic, ikleyn:Answer by josgarithmetic(39617) (Show Source):
Your equation is
= 0.6,
where A is the amount of the pure alcohol to add.
0.18*1.75 + A = 0.6*(1.75 + A)
A - 0.6*A = 0.6*1.75 - 0.18*1.75
A = = 1.8375 liters of pure alcohol to add.
Check. = 0.6. ! Correct !
Answer. 1.8375 liters of pure alcohol to add.
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