what was the coolest chemical reaction you have ever had

Question: what was the coolest chemical reaction you have ever had
- Keywords:
  chemical,
  chemical reaction
Asked by Satoru Fujinuma to Ryan on 7 Feb 2022.
- Ryan Holmes answered on 7 Feb 2022:
  
  Fischer Esterification
  An ester is generated from an alcohol and an carboxylic acid.
  The starting materials smell awful like rancid butter/milk or dead fish and the final product smells like fruits such as pineapple, strawberry, or pears. The whole smell of the lab shifts at a certain point. It is a really neat reaction. Look it up!