1. Chemical Reactions
May 09, 2016

2. Chemical Vs. Physical Change
Chemical A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. A chemical reaction is the change of a substance into a new one that has a different chemical identity.

3. How can I tell if a chemical reaction is occurring?
A chemical reaction is usually accompanied by easily observed physical effects,
Emission of heat and light
The formation of a precipitate
The evolution of gas,
Color change.
***Absolute confirmation of a chemical change can only be validated by chemical analysis of the products!

4. Types of Chemical Reactions
1. Synthesis Reaction (Combination Reaction)
A       +       B                          AB
3. Single-Replacement Reaction
AB    +       C                          AC    +       B
4. Double-Replacement Reaction
AB    +      CD                   AC   +      BD
Decomposition Reaction
AB                            A      +      B