Stoichiometry is a branch of chemistry that focuses on the quantitative relationships between reactants and products in a chemical reaction. This involves writing chemical equations using names and symbols, as well as understanding the different types of reactions that can occur. 1. Chemical Equations: Chemical equations describe chemical transformations by indicating the reactants and products involved. Names and symbols of elements and compounds are used to write these equations. For example, the formation reaction of water can be written as: 2. Types of Reactions: There are several types of chemical reactions, including combination, decomposition, single replacement, double replacement, and combustion reactions. Combination Reaction: Two or more substances combine to form a product. For example: Decomposition Reaction: A substance breaks down into two or more simpler substances. For example: Single Replacement Reaction: An element replaces another in a compound. For example: Double Replacement Reaction: Two compounds exchange components to form two new compounds. For example: Combustion Reaction: A substance reacts with oxygen, releasing energy in the form of heat and light. For example: A bit more difficult… EXERCISE
