Types of Chemical Reactions: Synthesis and Decomposition

Types of Chemical Reactions: Synthesis and Decomposition
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In chemistry, there are four basic types of chemical reactions: synthesis, decomposition, single replacement, and double replacement. Synthesis reactions involve two or more simple substances combining to

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Slide1Chemical Reactions

Slide24 Basic Types of Chemical Rxns Synthesis  Decomposition  Single Replacement  Double Replacement

Slide3Synthesis Reaction Two or more simple substances combine to form a new, more complex substance.  A  +  B  ---> C

Slide4Synthesis Reactions Example:  Na  +  Cl    ---->  NaCl  Corrosion of  metals are synthesis rxns.

Slide5Decomposition Reactions A complex substance breaks down  into two or more simpler substances.  Can you think of a decomposition reaction in biology?

Slide6Decomposition Reactions  C  --->  A  +  B  Write an equation - Calcium Carbonate decomposes into calcium oxide and carbon dioxide.

Slide7Single-Replacement Reaction An uncombined element replaces an element that is part of a compound  A  +  BX  --->  AX  +  B  Example: Sodium  + water  --->  Sodium hydroxide  + hydrogen

Slide8Double-Replacement Reaction Different atoms in two different compounds replace each other.  AX  +  BY  --->  AY  +  BX  MgCO 3   +  2 HCl  --->  MgCl 2   +  H 2 CO 3  The carbonic acid decomposes into water and carbon dioxide.