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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!!!!!