In this laboratory you will learn about conservation of masses based on the example of reaction of baking soda with ac etic acid. Long-term plan section Subsections of the standard curriculum Learning objectives Formulas of substances and equations of chemical reactions Drawing up equations of chemical reactions. The law of conservation of mass of substances. Laboratory experiment No. 2 “Ratio of reacting substances” 8.2.3.2 establish experimentally the ratio of reacting substances; 8.2.3.3 to make equations of chemical reactions, writing down formulas of reagents and reaction products; 8.2.3.4 know the law of conservation of mass of substances