6.We added the caustic soda in the erlenmeyer flask.
7.We put on an heater a becher, full of water.
8.We waited that the water boiled in the becher.
9.We put the erlenmeyer flask (with the watrer, the alcohol and the caustic soda) in the becker.
10.We set the erlenmeyer flask on a clamp, because the mixture inside the beuta didn’t mix with
the water in the becker.