Help - 70% or 80% Ethanol
I need help for what I should do. I think I messed up with making 70% ethanol. In batch 1, I’m pretty sure I added 600 mL of ethanol (200 proof) and 1400 mL of dH2O. I know this would give a concentration of 30%. In batch 2, which was added to batch 1, I added 600 mL of dH2O and 1400 mL of ethanol. Since I was pretty sure I did the wrong amounts in batch 1, I added 2300 mL of ethanol. If I did batch 1 wrong, the percent comes out to 68%. However if I did batch 1 right with 600 mL of dH2O and 1400 mL of ethanol, it’s 80% now. Should I add more dH2O to dilute it in case I did it right? If I did, I was thinking of doing 500 mL dH2O so the concentration would be 75% if I did batch 1 correct. However if I add 500 mL dH2O and I did batch 1 wrong it becomes 63%. I’m not sure what to do. It’s either 68% or 80% now. I could make it 63% or 75% if I add 500 mL dH2O.