C5) Chemical Properties And Chemical Change Flashcards
0
Q
Chemical properties can be useful.
A
Denim is resistant to harsh cleaners
Baking soda bubbles, causing cake to rise
Certain bacteria turn milk into cheese
Wood is combustible, so it is used for heating.
1
Q
What is a chemical property?
A
A chemical property describes how a substance interacts with other substance
Ex. Gasoline is flammable. It reacts with oxygen
2
Q
What is a chemical change?
A
A chemical change is the alteration of one or more starting substances into completely NEW SUBSTANCES with new properties.
Ex. Wood becomes ashes, water and carbon dioxide when burned
3
Q
Clues to a CHEMICAL CHANGE
A
Clues to a CHEMICAL CHANGE
- A new unexpected colour appears
- Energy is produced (heat or light)
- Energy is absorbed( it feels cold)
- A new gas is formed( bubbles or new smell)
- A precipitate forms (a solid (chunks or cloudy) material appears when 2 liquids combine)
