Question

How much water should mixed with 12ml of alcohol so as to obtain 12% alcohol solution..¿¿¿

Answer 1

Let the volume of water to be mixed be x mlTotal volume of the mixture = (x+12) mlIf this is to be 12% alcohol solution, that means that the *mixture* contains12% of alcohol by volume.We know that the mixture has 12 ml of alcohol.So, we get the equation - 12/(x+12) = 12% or 12/100SimplifyingCross multiplyingx = 88 mlNeed to add 88 ml of water to make it a 12% alcohol solution.