How do you make 100 percent of ethanol from 80 percent ethanol?

Answer 1

Distil it to remove the other substances. You may have to use fractional distillation, depending upon whether the other substances evaporate at a lower or higher temperature.

Answer 2

To increase the concentration of ethanol from 80% to 100%, you can use a process called distillation. By distilling the 80% ethanol solution, you can separate the ethanol from the water and other impurities, resulting in a higher concentration of ethanol.