Students in MYP1 science class
Students in MYP1 science class as a 'service as action' activity solved our current problem of finding hand sanitizer to keep viruses at bay.
They prepared their own supply after some initial research. They calculated and measured the necessary volumes of water and isopropyl alcohol (40:60) to make an effective sanitizer.
In order to reduce skin dryness which alcohol solutions can cause it was necessary to add a small quantity of vegetable glycerol (2%).