1.We measured 80 ml of water and 20 ml of ethilic alcohol in a graduated cylinder.
2.We filled the erlenmeyer flask with 80 ml of water.
3.We put inside the beuta 20 ml of ethilic alcohol, too.
4.We steared the mixture.
5.We measured 25 grams of caustic soda (the molecular mass of the caustic soda is 40 MM).