Chemical Properties KEY
2.3
Begin a 4 page foldable, entitled “Chemical Properties, 2.3”, Read pages 50-54, and “Chemical Properties”
PowerPoint., and use Lab 2.3.1.
Tab 1: Chemical Properties, p 50-51/1. Define chemical property (Use the definition in the margin.) A
CHEMICAL PROPERTY IS A PROPERTY OF MATTER THAT DESCRIBES A SUBSTANCE’S ABILITY
TO PARTICIPATE IN CHEMICAL REACTIONS ;
2. CHEMICAL PROPERTIES DESCRIBE MATTER BASED ON ITS ABILITY TO CHANGE INTO NEW
MATTER THAT HAS DIFFERENT PROPERTIES.
Tab 2: Flammability: A Chemical Property, p 50-51/
1. Define flammability; FLAMMABILITY IS THE ABILITY OF A SUBSTANCE TO BURN
2. Draw a picture of a stick of wood.
3. Write down at least one physical property and one chemical property of that wood;.
A PHYSICAL PROPERTY OF THIS PIECE OF WOOD IS THAT IT IS A TAN COLOR SHAPED LIKE A
CYLINDER, ANGLED AT THE END
4. Draw a picture of the wood after it goes through a chemical change (after it burns)-
5.Write down at least one physical property and one chemical property of the new substance;. A PHYSICAL
PROPERTY OF THE ASHES IS THAT IT IS GRAY IN COLOR AND IN SMALL FINE POWDER. A
CHEMICAL PROPERTY IS THAT ASHES ARE NOT FLAMMABLE
Tab 3: Reactivity: A Chemical Property, p 50-51/
1. Define reactivity; REACTIVITY IS THE ABILITY OF TWO OR MORE SUBSTANCES TO COMBINE
AND FORM ONE OR MORE NEW SUBSTANCES.
2. Draw a picture of a piece of steel wool. (or a car.)
3. Write down at least one physical property (such as color or luster) and one chemical property of the steel
wool (or the car.);. A PHYSICAL PROPERTY OF STEEL WOOL IS THAT IT IS THE COLOR GREY.
4. Draw a picture of the steel wool (or the car) after it goes through a chemical change –reacts with copper
sulfate or oxygen;
5. .What is this new substance called: Write down at least one physical property and one chemical property of
the new substance;. THE NEW SUBSTANCE IS RUST.
A PHYSICAL PROPERTY OF RUST IS IT IS THE COLOR ORANGE. AND IT IS A FINE POWDER
A CHEMICAL PROPERTY OF RUST IS THAT IT IS NOT REACTIVE TO WATER OR OXYGEN
Tab 4: Chemical Changes, p 52/1. Define chemical change; A CHEMICAL CHANGE IS A CHANGE
THAT HAPPENS WHEN ONE OR MORE SUBSTANCES ARE CHANGED INTO NEW
SUBSTANCES THAT HAVE NEW AND DIFFERENT PROPERTIES
2. List evidence of a chemical change, (use BOAST ‘N)
YOU CAN USE THE WORD BOAST’N TO HELP YOU REMEMBER THE SIGNS OF CHEMICAL
CHANGES:
BUBBLES FORMED, ODOR CHANGED, ALTERED COLOR, SOLID FORMED FROM LIQUIDS,
TEMPERATURE CHANGED, NEW SUBSTANCE WITH NEW PROPERTIES
3. Give an example of when bubbles may not be enough evidence that a chemical change happened;
IF YOU JUST SHAKE OR OPEN A CAN OF POP, YOU MIGHT SEE BUBBLES, BUT THIS IS JUST
CARBON DIOXIDE BEING RELEASED- IT WASN’T FROM A CHEMICAL REACTION.
4. How many pieces of evidence are needed to identify a change as a chemical change?
YOU USUALLY NEED AT LEAST TWO PIECES OF EVIDENCE TO BE SURE A CHEMICAL
CHANGE HAS OCURRED.
Tab 5: Chemical vs Physical Changes, p 53-54/ 1. List and
pictures of five physical changes (Be sure to include solubility
and phase changes.); Dissolving, melting, crushing, shredding,
slicing, evaporating
2. List and pictures of five chemical changes;
Bubbles
Produced
odor
changed
light
irreversible
new
color
or heat change
substance changed
produced
precipitate burning
formed
3. Explain what the most important question is to ask when
determining whether a change is a physical or chemical change.
THE MOST IMPORTANT QUESTION TO ASK IS, “DID
THE COMPOSITION CHANGE?”