Chemical Reactions May 09, 2016.

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Presentation transcript:

Chemical Reactions May 09, 2016

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.

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!

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