91% Isopropyl Alcohol: Scale Down the WHO Hand Sanitizer Formula скачать в хорошем качестве

91% Isopropyl Alcohol: Scale Down the WHO Hand Sanitizer Formula

The previous video showed how to scale down the WHO hand sanitizer formula to make any amount using of pure or 99% isopropyl alcohol. (   • Scaling Math: WHO Hand Sanitizer Formula H...  ) Alcohol is sold in different strengths. For the weaker solutions, you need to add more milliliters to get the same amount of alcohol. If you are using 91% alcohol, divide the amount of pure alcohol needed by .91. For example, to make 320 ml of hand sanitizer, you need 240 ml pure alcohol, or 240/.91 = 264 ml of 90% alcohol. If you are using 70% alcohol, you to REMOVE water from the solution to get 75% alcohol in the final hand sanitizer. The next video shows you what to do in that case. Modify the formula to use 70% isopropyl alcohol    • 70% Isopropyl Alcohol: Scale Down the WHO ...   Modify the formula to used ethanol instead of isopropyl alcohol    • Ethanol 180 & 140 Proof: Scale Down the WH...