Jawapan

2016-08-21T22:51:15+08:00
Based on an article in a blog, it says ethanoic acid
2016-08-21T23:59:02+08:00
Acidic substance such as ethanoic acid and methanoic acid.
Latex also coagulated when left aside for 2 days because of bacterial action.
Bacteria in the air enter the latex and produce lactic acid that contain hydrogen ion which causes the coagulation of latex.