ChemistryChemistryPresented by:Presented by:

Anita Schulek and Ann CioffiAnita Schulek and Ann Cioffi

ChemistryChemistry• The study of the materials

(chemicals) that make up all of the things on our planet.

• Chemistry will show how these substances combine, such as how they react with each other and the properties of each chemical.

ChallengeChallenge• The challenge you are about to

explore is all about chemistry, chemical reactions and classes of matter.

• You will perform some experiments, observe chemical changes and even design a product by selecting the chemicals that go into it.

Warm-UpWarm-UpChemical Reaction-Removing Chemical Reaction-Removing

OxidationOxidation

Have you ever noticed what happens to a shiny new copper penny over time?

It becomes dull and changes color to dark brown.

This change in the physical properties of the penny is caused by oxidation.

A chemical reaction takes place and the copper changes color.

In the warm-Up activity that follows we will use chemicals to change and old penny back into its shiny self.

Proceed to the Warm-UpProceed to the Warm-Up

We will create a chemical reactionthat will remove the oxidation on the

copper penny.

Warm-Up Warm-Up Magic MudMagic Mud

• Creating a colloidal suspension

Sometimes changes may be Sometimes changes may be physicalphysical

• Material shape• Color• Hardness• Texture

Reactions can change the Reactions can change the chemical propertychemical property

• You would not eat a chunk of sodium. • You would not want to inhale chlorine

gas, its very poisonous.

• Combine the two elements and a chemical change takes place creating sodium chloride or salt.

PhasePhase• Combining chemicals may also

change the phase or state of a material.

• Matter can be found in solid, liquid and gaseous states.

SolidsSolids Liquids Liquids

• Solids maintain their shape

• Liquids flow and take on the shape of their container.

Gases

• Gases are substances that have no shape

ActivityActivity• In the activity that follows, you will

combine materials to create a colloidal suspension.

• A suspension takes place when small particles are suspended in the liquid but do not dissolve.

Magic MudMagic Mud

Has the properties of a solid and a liquid at the same time

Warm-UpWarm-UpSlimeSlime

• All materials are made up of atoms joined together.

• When two or more atoms bond together a molecule is formed.

Chemical PolymerChemical Polymer• In the warm-up activity you will

create a chemical polymer.• Polymers are substance that are

made up of monomers.• A monomer is a small molecule that

likes to bond together with other monomers forming a long chain of molecules connected together.

These long chains of molecules are

polymers.

Design ChallengeDesign ChallengeIce-Cream In A Bag

ChemistsChemists• It’s all about combining the

chemicals that will produce a material with the properties you desire.

• Whole Milk• 1% Milk• Cream

Ice Cream is an EmulsionIce Cream is an Emulsion• An emulsion is formed when liquid

droplets are suspended in another liquid, like the way oil and water mix.

Ice Cream is also FoamIce Cream is also Foam• A foam is created when gas

molecules like air is mixed in a liquid.

Ice Cream is Emulsion FoamIce Cream is Emulsion Foam• Ice cream is

emulsion foam that has been frozen to create a crystalline structure.

Toppings Toppings

Each chemist will create a unique

ice cream.

HAVE FUN!!!!!HAVE FUN!!!!!