Chapter 1: Chemical Reactions and Equations
1.1 Chemical Reactions
A chemical reaction occurs when one or more substances (reactants) are converted into new substances (products).
Indications of a chemical reaction:
Change in color
Change in temperature
Evolution of gas
Formation of a precipitate
, 1.2 Types of Chemical Reactions
1.
Combination Reaction: Two or more reactants combine to form a single product.
Example:
2.
Decomposition Reaction: A compound breaks down into two or more simpler substances.
Thermal decomposition:
Electrolytic decomposition:
Photolytic decomposition:
3.
Displacement Reaction: A more reactive element displaces a less reactive element.
Example:
4.
Double Displacement Reaction: Exchange of ions between reactants.
1.1 Chemical Reactions
A chemical reaction occurs when one or more substances (reactants) are converted into new substances (products).
Indications of a chemical reaction:
Change in color
Change in temperature
Evolution of gas
Formation of a precipitate
, 1.2 Types of Chemical Reactions
1.
Combination Reaction: Two or more reactants combine to form a single product.
Example:
2.
Decomposition Reaction: A compound breaks down into two or more simpler substances.
Thermal decomposition:
Electrolytic decomposition:
Photolytic decomposition:
3.
Displacement Reaction: A more reactive element displaces a less reactive element.
Example:
4.
Double Displacement Reaction: Exchange of ions between reactants.
