Physical Property
Any characteristic that gives a substance the ability to undergo a change that results in a new substance.
What is a chemical property?
Change in state or form with a chemical change.
It can be reversed.
What is a physical change?
Frying an egg
Chemical change.
A new substance is formed through a chemical reaction. Usually irreversible.
What is a chemical change?
Describe the law of conservation of mass
No new atoms can be created or destroyed, they can only be rearranged
List two chemical properties
Flammability, reacts with oxygen, reacts with light, reacts with water (answers may vary)
Melting a popsicle or burning toast?
What is melting a popsicle?
Water evaporating.
Physical change?
Ice cube melting or cooked egg
cooked egg
A chemical reaction produces two new substances, and each product has a mass of 25g. What was the total mass of the reactants?
What is 25g
What are the three states of matter?
Solid, liquid, gas
What is rust?
Metal reacts with oxygen and water producing this substance.
chopping wood or burning wood
What is chopping wood.
Mowing the lawn.
Physical change?
Milk turning sour or a shiny substance
milking turning sour
A chemical reaction occurs, one of the reactants has a mass of 35g. The product side is 100 g. What is the mass of the other reactant?
What is 65g
This term refers to the shiny appearance of some metals.
What is luster?
This occurs when a sliced banana or apple is exposed to oxygen.
Oxidation
Provide an example of a physical change.
Answers will vary.
An apple turning brown.
Chemical change
Combustion or solubility
combustion
When salt is mined, machines scrape the mine walls and change salt rocks into very tiny salt crystals. What happens to the mass of 1 kilogram of salt rocks when the rocks change into very tiny salt crystals?
What is the total mass stays the same?
Something that can bend or mold without breaking.
What is malleability?
What is toxicity?
What is poison?
The ability to be drawn into wire.
What is ductility?
Dissolving sugar in water.
Physical change.
What are 3 words that can indicate a chemical change has occurred?
Rot, decompose, explode, rust, burn, etc.
In a reaction with vinegar and baking soda, can you continue to add more and more of one reactant and expect to get more and more product? Why or why not?
No, if you continue to add more of only one reactant, it will eventually run out of the other reactant to react with.