Combine a slice of fresh yeast (about the size of a pea) with 1/4 cup sweet compote. Draw the mixture into the syringe and keep it warm with the needle down. Record changes in the volume of the gas bubble under the piston. When the bubble takes up 2/3 of the syringe, free the syringe from the compote and release the remaining gas in it into the milk of lime solution. Cloudy milk of lime indicates that carbon dioxide has entered it
As a result of the life of the yeast, which feeds on sugar, carbon dioxide is released, which can be determined using a solution of milk of lime, which will interact with carbon dioxide (this is a chemical reaction) and we will see the formation of a new chemical – calcium salt, which gives the turbidity.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.