7. I have 200 ml of a solution of 40% alcohol in water. How much alcohol must I add to make the solution 60% alcohol?

Question

7. I have 200 ml of a solution of 40% alcohol in water. How much alcohol must I add to make the solution 60% alcohol?

Answer 1

200ml x .40 alcohol= 80 ml

 

200 ml x .60= 120 ml alcohol

 

 

120 ml- 80 ml= 40 ml of alcohol should be added to the 40% solution to reach a solution with 60% alcohol.