00:03 Distinguishing between physical and chemical changes 02:21 Chemical changes involve formation of new substances. 04:47 Chemical equation is the symbolic representation of reactants and products in a chemical reaction 07:09 Balancing chemical equations using the law of conservation of mass 09:35 Balancing chemical equations involves ensuring an equal number of atoms on each side. 12:02 Different types of chemical reactions explained 14:26 Summary of Chemical Reactions 16:50 Characteristics of Chemical Reactions Crafted by Merlin AI.