Test- Unit 2 Matter Flashcards
1
Q
- Is the color of ink a physical change, chemical change, physical property, or chemical property?
A
Physical property
2
Q
- Give three examples of physical changes.
A
Boiling of water, blowing up a ballon, and melting a candle
3
Q
- A flask containing molecules of gas A and a separate flask containing molecules of gas B are both at the same temperature. Gas A and B must have equal __________.
A
Volumes
4
Q
- Is trail mix a homogeneous mixture or a heterogeneous mixture?
A
Heterogeneous mixture
5
Q
- Is lemonade a homogeneous mixture or a heterogeneous mixture?
A
Homogeneous mixture
6
Q
- Is the fragrance of a flower a physical property, physical change, chemical property, or chemical change?
A
Physical property
7
Q
- Is boiling water a physical property, physical change, chemical property, or chemical change?
A
Physical change
8
Q
- In terms of saturation, how would you classify a KBr solution with a concentration of 90g in 100g of water at 10 degrees Celsius?
A
Supersaturated
9
Q
- Name one similarity between compounds and homogeneous mixtures and one difference.
A
Similarity- Both involve one element
Difference- compound is chemically combined and a mixture is physically combined
10
Q
- Explain how salt dissolves in water.
A
- H+ of water attract Cl-
- O-2 of water attract Na+
- Attractive force pulls ions away from crystal
- Water surrounds each ion and continues until ions are separated
