In industry fermentation may be carried out over long periods of time but in school laboratories we only do it for a period or so. cause our low grade yeast dies off after a while anyway due to the acidity.
whats the rubber tube for? :S
i only remember using the bent glass tube and placing it in a test tube with limewater in it, i dont remember connecting a rubber tube to it :S
maybe you did it different from my class iuno
5. boil the water bath until it is around 36-37 degrees celcius
6. place conical flask in the water bath and place galss tube into limewater solution.
7. let reaction take place for however long you want, maintaining the temperature at 36-37 degrees. During this time you must observe the limewater to see if the reaction is taking place (it should turn milky since CO2 is released)
8.remove conical flask and dry the outside
9. reweigh all the things again
9. calculate stuff zzz i forgot D: