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Chemical ReactionTypes
Chapter 11 Section 2 Presented by:
Mrs.
Weldon
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There are 5 types of
ReactionsCombination
ecomposition
Sin!le"replacement
o#ble"replacement
Comb#stion
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Combination Reactions$lso called synthesis
%cc#rs &hen t&o or
more s#bstancesreact to form a sin!lene& s#bstance.
$ ' ( $(When Ma!nesi#m
reacts &ith %)y!en*Ma!nesi#m %)ide isformed.
2M! ' %2 2M!%
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COMBINATION
Remember ta+e t&o or morethin!s p#t them to!ether toma+e
one.
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DECOMPOSITION%pposite of combination
When a sin!le s#bstance brea+s do&n into 2 or moresimpler
s#bstances.
$( $ ' (
When Merc#ry ,, %)ide is heated it decomposes toform merc#ry and
o)y!en.
2-!% 2-! ' %
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ecomposition
Remember*ta+e onethin! anddecomposeit into it/sparts.
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Sin!le"replacement
reactionsReaction in &hich oneelement replaces a
second element in acompo#nd.
$n element and a
compo#nd react toform a ne& element
and ne& compo#nd.
Reaction depends onan acti0ity series.
$ reacti0e metal &illreplace any metal less
reacti0e.
$ reacti0e nonmetal&ill replace less
reacti0e nonmetals.
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Remember,single-
replacement changes apartner if cmpatible!
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"B#E-REP#ACEMENT REACTIO$ reaction in &hich t&o
compo#ndse)chan!e an ion to form t&o ne&compo#nds.
a2S ' Cd%342 CdS ' 2a%3
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D$ble-replacement
Remember "T&o
thin!s react ande)chan!e partsto form t&o ne&thin!s.
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Cmb$stin$ chemical reaction in &hich a compo#ndreacts
&ith o)y!en to form carbon dio)ideand &ater.
C-6' 2%2 C%2' 2-2%
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Comb#stion of Methane
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IN RE%IE&
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There are 5 types of chemical reactions:
Combination*ecomposition* Sin!le"replacement*
o#ble"replacement*
and Comb#stion.
Combination ta+es 2 or more parts and ma+es a
ne&s#bstance.
ecomposition ta+es one s#bstance and brea+s it into
itsparts.
Sin!le"Replacement is &hen a sin!le element ta+es theplace
of an element in a compo#nd to form a ne& sin!le
element and compo#nd.
o#ble"Replacement is &hen t&o compo#nds e)chan!ean ion
to form t&o ne& compo#nds.
Comb#stion is &hen a compo#nd #s#ally a hydrocardon4
reacts &ith o)y!en to form carbon dio)ide and &ater.
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