Types of Chemical Reactions

What you will know after the next two class periods

• You will be able to identify a combustion reaction• You will be able to identify a double replacement reaction• You will be able to identify a single replacement reaction• You will be able to identify a synthesis reaction• You will be able to identify a decomposition reaction

• You will be able to balance all of these chemical reactions• You will have a greater appreciation for the power of some simple chemicals

5 Major Rxn Types

5 types of reactions

Combustion Reaction

Some type of hydrocarbon (fuel) + O2 ------> CO2 + H2O + heat

C3H8O(l) + O2(g) -------> CO2(g) + H2O(l) + heat

Isopropyl alcohol

2 C3H8O(l) + 9 O2(g) -------> 6 CO2(g) + 8 H2O(l)

Molar mass = 60 g/mol60 g 1 mole of IPA

Double Replacement Reaction

AB + CD ------> AD + CB

Pb(NO3)2(aq) + KI(aq) -------> PbI2(s) + KNO3(aq)

Pb(NO3)2(aq) + 2 KI(aq) -------> PbI2(s) + 2 KNO3(aq)

Single Replacement Reaction (Displacement Rxn)

A + BC ------> AC + B

Zn(s) + HCl(aq) -------> ZnCl2(aq) + H2(g) + heat

Zn(s) + 2 HCl(aq) -------> ZnCl2(aq) + H2(g) + heat

How Can We Tell If A Single Replacement Reaction Will Occur?

A (metal) + BC ------> AC + B

Zn(s) + 2 HCl(aq) -------> ZnCl2(g) + H2(g)

Table similar to this on page 333of your textbook

Synthesis Reaction

A + B ------> AB

H2(g) + O2(g) -------> H2O(g) + lots of heat

2H2(g) + O2(g) -------> 2H2O(g) + lots of heat

Decomposition Reaction

AB ------> A + B

ABC ------> AB + C

ABC ------> A + B + C

Decomposition Reaction

Decomposition Reaction “The Catalyst” Yogi

Decomposition Reaction

AB ------> A + B

KClO3(s) ------> KCl(s) + O2(g)

ABC ------> AB + C

2 KClO3(s) ------> 2 KCl(s) + 3 O2(g)