types of chemical reactions. what you will know after the next two class periods you will be able to...

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)