Various chemical reactions

Various chemical reactions in order to facilitate the conduct of chemical reactions , chemical reactions are then grouped by similarity owned . One classification system based on the way the atoms rearrange in chemical reactions , among others :
1 . Chemical reactions Merger
In reaction to the merger of two or more substances incorporated to form other substances . The general formula coupling reaction as follows :
A + B → AB
example
The reaction between hydrogen with oxygen to form water is a coupling reaction .
2H2 ( g ) + O2 ( g ) → 2H2O ( )

2 . Chemical decomposition reactions
Decomposition reaction is the opposite reaction than the coupling reaction . In this reaction a split or decomposed substance into two or more simpler substances . Most of these reactions require energy in the form of heat , light , and electricity . The general formula decomposition reaction as follows :
AB → A + B
example
Decomposition reaction of water by electricity generating hydrogen and oxygen . electricity
2H2O ( ) → 2H2 ( g ) + O2 ( g )
3 . Chemical Reaction Replacement
Single replacement reaction occurs , when one element replaces another element in a compound . To complete the replacement of the equation , there are two equations , namely :
a. At issue , A replaces B as follows :
A + BC → B + AC
b . At issue , the D replaces C as follows :
D + C + BC → BD
example
A copper wire is inserted into a solution of silver nitrate . Copper is more active than silver , copper replaces the silver to form a solution of copper ( II ) nitrate is blue . The reaction between copper with silver nitrate , as follows :
Cu ( s ) + 2AgNO3 (aq ) → 2AG ( s ) + Cu ( NO3 ) 2 ( aq)

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