Types of Chemical Reactions

There are five types of chemical reactions: Classifying Chemical Reactions There are five types of chemical reactions: synthesis, combustion, decomposition, and single replacement and double replacement reactions.

Don’t forget you have this table in your notes as reference

Type of Reaction: Synthesis reaction Explanation: Types of Chemical Reactions Type of Reaction: Synthesis reaction Explanation: Reaction in which two or more elements react to produce a single product (compound). Demo (write observations under Explanation)

Types of Chemical Reactions (cont.) Other: When two elements react, the reaction is always a synthesis reaction. General Equation: A + B AB Write general equation in your notes

Type of Reaction: Combustion Reaction Explanation: Types of Chemical Reactions Type of Reaction: Combustion Reaction Explanation: Reaction where oxygen combines with a substance (normally contains carbon) and releases energy in the form of heat and light.

Types of Chemical Reactions (cont.) General Equation: ___ + O2 H2O + CO2 CH4 (g) + O2 (g)  CO2 (g) + H2O (g)

Decomposition Reaction Explanation: Types of Chemical Reactions Type of Reaction: Decomposition Reaction Explanation: Reaction in which a single compound breaks down into two or more elements or new compounds. Start here with 5th

Decomposition Reactions Other: Decomposition reactions often require an energy source, such as heat, light, or electricity, to occur. General Equation: AB A + B

S = synthesis D = decomposition C = combustion Correctly identify the following reactions: NH3+ H2SO4  (NH4)2SO4 C5H9O + O2  CO2 + H2O H2 + O2  H2O NH4OH  NH3 + H2O KClO3 (s)  KCl (s) + O2 (g) Al (s) + S (s)  Al2S3 (s) NaNO3 (s)  NaNO2 (s) + O2 (g) CO (g) + O2 (g)  CO2 (g) CH4 (g) + O2 (g)  CO2 (g) + H2O (g) Mg + N2  Mg3N2 S = synthesis D = decomposition C = combustion Put in notes #1-10 and write the letter next to the number for your answer.

Type of Reaction: Single Replacement Explanation: Types of Chemical Reactions Type of Reaction: Single Replacement Explanation: Reaction in which the atoms of one element replace the atoms of another element in a compound. Demo (write observations under Explanation)

Replacement Reactions General Equation: A + BX AX + B Other Info: A metal will not always replace a metal in a compound dissolved in water because of differing reactivates. Hydrogen gas goes here Do not need to memorize table or even copy table down, just need to see how it works. An activity series can be used to predict if reactions will occur.

Reaction in which the elements exchange between two compounds. Types of Chemical Reactions Type of Reaction: Double Replacement Explanation: Reaction in which the elements exchange between two compounds.

Replacement Reactions (cont.) General Equation:

Precipitate: The solid product produced during a chemical reaction. Replacement Reactions (cont.) Precipitate: The solid product produced during a chemical reaction. All double replacement reactions produce either water, a precipitate, or a gas.

Answer the following questions on a ¼ sheet of paper and turn in when you leave today. skip

A B C D Section Assessment 1. Which of the following is NOT one of the four types of reactions? A. deconstructive B. synthesis C. single replacement D. double replacement A B C D A

A B C D Section Assessment 2. The following equation is what type of reaction? KCN(aq) + HBr(aq) → KBr(aq) + HCN(g) A. deconstructive B. synthesis C. single replacement D. double replacement A B C D D