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
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