There are 4 types of inorganic reactions you need to know;
synthesis, decomposition, single and double replacement.
Synthesis- A + B --> AB
(1 Product)
2Al + 3I2--> 2AlI3
Decomposition AB--> A + B (1 Reactant)
2H2O2 --> 2H2O + O2
Single Replacement A + BC --> AC + B (an
element replaces another and it is left all alone)
2Mg + CO2--> 2MgO + C
Double Replacement (Metathesis) AB + CD --> AD
+ CB (switch partners)
AgNO3 + NaOH--> AgOH(s)
+ NaNO3
Hydrocarbon Combustion CxHy
+ O2 --> X CO2 +1/2Y H2O
Peroxyacetone + O2 --> CO2 + H2O
Past
Regents Balancing Questions- Follow link for answers
June 2009-34 Given the balanced equation representing a reaction:
4Al(s)+ 3O2(g)-->2Al2O3(s)
Which type of chemical reaction is represented by this equation?
(1) double replacement
(2) single replacement
(3) substitution
(4) synthesis
Jan 2004-38 Given the reaction:
Mg(s)+ 2 AgNO3(aq)-->
Mg(NO3)2(aq)+
2 Ag(s)
Which type of reaction is represented?
(1) single replacement (3) synthesis
(2) double replacement (4) decomposition
August 2005-38
Given the balanced equation:
AgNO3(aq)+ NaCl(aq)
==> NaNO3(aq)+ AgCl(s)
This reaction is classified as
(1) synthesis
(2) decomposition
(3) single replacement
(4) double replacement
Jan
2010-10
In which type of reaction do two or more substances combine to produce a single
substance?
(1) synthesis
(2) decomposition
(3) single replacement
(4) double replacement
Aug 2009-35
Which equation represents a decomposition reaction?
(1) CaCO3(s)==>CaO(s)+
CO2(g)
(2) Cu(s)+ 2AgNO3(aq)
==>2Ag(s)+ Cu(NO3)2(aq)
(3) 2H2(g)+ O2(g)
==>2H2O(l)
(4) KOH(aq)+ HCl(aq)
==>KCl(aq)+ H2O(l)
