Chemical Reaction

Chemical Reaction

Ms. R. Armstrong

TYPES OF CHEMICAL REACTIONS

• Combination

• Decomposition

• Precipitation

• Neutralization

• Combustion

• Displacement

COMBINATION REACTION

• Two or more compounds combine to form one compound.

DECOMPOSITION REACTION

• The opposite of a combination reaction – a complex molecule breaks down to make simpler ones.

PRECIPITATION REACTION

• Two solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) forming.

NEUTRALISATION REACTION

• An acid and a base react with each other. Generally, the product of this reaction is a salt and water.

COMBUSTION REACTION

• 
  

  Oxygen combines with a compound to form carbon dioxide and water. These reactions are exothermic, meaning they give off heat

DISPLACEMENT REACTION

• One element takes place with another element in the compound

Let's check what you remember

Multiple Choice

In order for neutralization to take place, a __________ and an ___________ must react with each other.

• acid + salt

• base + acid

• water + salt

• acid + water

Multiple Choice

When two compounds come together to form one compound, this is a

• displacement reaction

• combination reaction

• precipitation reaction

• combustion reaction

Multiple Choice

Combustion reactions give off heat

• true

• false

Multiple Choice

Which reaction does this represents?

A + BC → AC + B

• displacement reaction

• decomposition reaction

• combustion reaction

• combination reaction

Multiple Choice

Which reaction does this represent?

AB → A + B

Hint: It is the opposite of another reaction learnt

• displacement reaction

• combination reaction

• decomposition reaction

• combustion reaction

MIXTURES

A mixture is made from different substances that are not chemically joined.

NO CHEMICAL REACTIONS

TYPES OF MIXTURES

• Homogenous

• Heterogenous

HETEROGENOUS MIXTURE

A heterogeneous mixture is simply any mixture that is not uniform in composition.

...

Vegetable soup is a heterogeneous mixture. Any given spoonful of soup will contain varying amounts of the different vegetables and other components of the soup.

Skittles

• This is a homogenous mixture

• You can separate the pieces of candy physically

HOMOGENOUS MIXTURE

In this type of mixture, the components are evenly distributed throughout and the mixture has a uniform appearance

....

This orange juice was sweetened with some sugar.

Once the sugar particles have completely dissolved then it is considered a homogenous mixture

Multiple Choice

Is this a heterogenous mixture or homogenous mixture?

• Heterogenous

• Homogenous

Multiple Choice

What type of mixture is this?

• homogenous

• heterogenous

Multiple Choice

This is chocolate milk. What type of mixture is it?

• homogenous

• heterogenous

Multiple Choice

What type of mixture this sugar + water?

• homogenous

• heterogenous

WHAT IS A SOLUTION?

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

SOLUTE

• the substance that dissolves in a solvent to produce a homogeneous mixture

• A substance that is dissolved in another substance (a solvent), forming a solution

SOLVENT

• the substance in which a solute dissolves to produce a homogeneous mixture

• A substance, ordinarily a liquid, in which other materials dissolve to form a solution.

Multiple Choice

Another name that can be used for homogenous mixture is

• heterogenous

• solvent

• solute

• solution

Fill in the Blank

The substance that dissolves in another is called a _______

Fill in the Blank

The substance that does the dissolving is called _______

Poll

Are you ready far school next week?

• Yes

• A little

• No