THE DIFFERENT TYPES OF ___________________ ___________________

THE DIFFERENT TYPES OF CHEMICALREACTIONS

TODAY’S TARGETS:

To be able to describe

and identify 6 different types of Chemical Reactions

WHY DO WE CARE ABOUT CLASSIFYING TYPES OF CHEMICAL EQUATIONS???

It is human nature to want to classify things.We classify music, food and ...

oClassifying allows us to PREDICT what will happen before the reaction occurs!

HOW DO WE CLASSIFY TYPES OF REACTIONS?

Based on how the atoms become rearranged during the reaction.

CLASSIFYING REACTIONS BASED ON ATOM REARRANGEMENT

Remember:

REACTANTS are what we start with and

PRODUCTS are what we end with2H2 + O2 2H2O

TYPE 1- SYNTHESIS, COMBINATION OR ADDITION

Description2 or more reactants combine to make 1

single productGeneral Equation A+ B ABSpecific Example 2H2 + O2 2H2O

Analogy

boy meets girl = couple

Picture

TYPE 2- DECOMPOSITION OR BREAKING APART

Description1 Single reactant is broken down into 2 or

more products

General EquationA BA+ B

Specific Example 2H2O2H2 + O2

Analogy

The couple Breaks up!

Picture

TYPE 3- SINGLE REPLACEMENT OR SUBSTITUTION

Description1 single element replaces an element in a

compound

General EquationA + BC AC+ B

Specific Example Ca + MgCl2 CaCl2 + Mg

Analogy

Like one girl switching dance partners

Picture

TYPE 4- DOUBLE REPLACEMENT

DescriptionWhen elements in 2 different compounds

switch or change places

General EquationAB + CD AD+ CB

Specific Example NaCl + KI NaI + KCl

Analogy

Like 2 pairs or sets of dancers changing partners

Picture

Double replacement reactions produce a precipitate. This is an insoluble solid (it doesn’t dissolve) that usually sinks to the bottom of the solution.

TYPE 5- NEUTRALIZATION

Description Acid + Base Salt + Water

General EquationHA + BOH BA+ H20

Specific Example HCl + NaOH NaCl + H2O

Hint

Will always have OH on reactant (left) side and H20 on product

(right) side

TYPE 6- COMBUSTION OR BURNING

Description

Hydrocarbon reacts with Oxygen (O2) to produce Heat, Carbon Dioxide (CO2) and

Water (H2O)

General EquationCxHy+ O2 CO2+ H20

Specific Example CH4+ O2 CO2+ H20

Hint

Will always have CO2+ H20 on product (right) side

(methane)

REVIEW

Atom rearrangement1) Synthesis (Combination)2) Decomposition3) Single Replacement (Substitution)4) Double Replacement5) Neutralization6) Combustion ( Burning)

LAST NOTE:

Classifying chemical reactions is

all about PATTERNS!!!