Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Valence can tell us how many electrons elements are willing to

ACCEPT, DONATE, or SHARE…

The Charge on an ion can tell us which other ions it wants to be near…

What are the Types of Chemical Reactions we can control?

Open your workbook to a blank page – you will want record the five reaction types!

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Hydrocarbons can be burned in aCombustion Reaction

Burning gas for use in a Bunsen

Burner…

Methane + Oxygen → Carbon dioxide + Water

CH4(gas) + 2O2(gas) → CO2(gas) + 2H2O(liquid)

Chemical Word Equation:

Chemical Formulae:

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Combustion Reaction

CxHy + O2 → CO2 + H2O

A combustion reaction is when all elements in a compound are

combined with oxygen, which then produces carbon dioxide and water.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Multiple elements or compounds can form a new compound in a

Combination Reaction

Carbon dioxide Water

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Multiple elements or compounds can form a new compound in a

Combination Reaction

+ Water → Carbonic AcidCarbon dioxide Water

CO2(gas) + H2O(liquid) → H2CO3 (aqueous solution)

Chemical Word Equation:

Chemical Formulae:

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Combination Reaction

A + B → C

The reactants (A and B) can be either pure elements, or compounds. The

product (C) is a new compound formed from the reactants.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

A compound can be broken into simpler substances in a

Decomposition Reaction

How do we get fuel for our Hydrogen

Fuel-cell cars of the future?

Water → Hydrogen + Oxygen

H2O(liquid) → H2(gas) + O2(gas)

Chemical Word Equation:

Chemical Formulae:

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Decomposition Reaction

AB → A + B

The reactant (AB) is a compound. The products (A + B) can be elements or

compounds.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

A compound can break up, and one element can find a new partner straight away in

Single Replacement Reactions

Sodium metal in water…

Sodium + Water→ Hydrogen + Sodium Hydroxide

2Na(solid) + 2H2O(liquid)→ H2(gas) + 2NaOH(aqueous)

Chemical Word Equation:

Chemical Formulae:

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

A compound can break up, and one element can find a new partner straight away in

Single Replacement Reactions

Sodium + Water→ Hydrogen + Sodium Hydroxide

2Na(solid) + 2H2O(liquid)→ H2(gas) + 2NaOH(aqueous)

Chemical Word Equation:

Chemical Formulae:

Think of the water as a hydrogen atom with an OH- bonded to it…

The OH- breaks up with the hydrogen and links with the Sodium.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Single Replacement Reactions

A + BC → B + AC

A and B are elements. BC and AC are compounds.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Two compounds can react to form two new compounds in

Double Replacement Reactions

This type of chemical reaction features heavily in REDOX reactions (Year 11 & 12), where electrons move from one place to

another…

This reaction is also responsible for Precipitation reactions where a solid falls

out of a solution.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Double Replacement Reactions

Two compounds…

Silver Nitrate Potassium Chloride

AgNO3 KCl

+ →

The Ag+ and K+ cations, along with the NO3- and Cl-

anions, all mix in an aqueous solution.

Ag+ and Cl- fit soo well together, they link together and fall out of the solution as a solid – AgCl

precipitates out of solution.

AgCl(s) + KNO3(aqueous)(aqueous) (aqueous)

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Double Replacement Reactions

AB + CD → AD + CB

Cations A and C exchange anions B and D.

Types of Chemical Reactions

H+

OH-

Mg2+

O2-

Cu2+

Fe2+

H2O

Na+

N3-

CO2

Li+

NO3-

Five types of Chemical Reactions:Combustion ReactionCxHy + O2 → CO2 + H2O

Double Replacement ReactionsAB + CD → AD + CB

Combination ReactionA + B → C

Decomposition ReactionAB → A + B

Single Replacement ReactionsA + BC → B + AC