Test Unit 2 Matter Flashcards
1
Q
- The color of ink is a
A
Physical properties
2
Q
- Three examples of a physical change are
A
Burning of gasoline , rotting an egg and exploding fireworks.
3
Q
- In a solution, the substance that is being dissolved is
A
Solute
4
Q
- Which of the following is not a physical property
A
State
5
Q
- In which phase of matter are the molecules of the substances farthest apart from each other.
A
Gas
6
Q
- A flask containing molecules of gas A and a separate flask containing molecules of gas B are both at the same temperature. Gases A and B must have equal.
A
Average kinetic energies
7
Q
- Which of the following liquids would be the most viscous.
A
Syrup
8
Q
- Saltwater
A
Homogeneous
9
Q
- Salad dressing
A
Heterogeneous
10
Q
- Fragrance of a flower
A
Physical property
11
Q
- Burning popcorn and making water
A
Chemical change
12
Q
- How many grams of NaCIO are needed to make a saturated solution in 100g of water at 90C
A
180g
13
Q
- In terms of saturation, how would you classify a KBr solution with a concentration of 90g in 100g of water at 10C
A
Supersaturated
14
Q
- The solubility of which salt is the least affected by temperature.
A
NACL
15
Q
- Label the five parts of the heating curve
A
- solid
- Melting - heat of fusion
- Liquid
- Boiling pt - heat of vaporization
- gas
16
Q
- Label the states of matter.
A
Sublimation
Condensation
Freezing
17
Q
- Bose - Einstein condensates are used to simulate condensations in a
A
Black hole
18
Q
- List the three points in the kinetic- molecular theory.
A
All matter is made of particles
Particles are in constant random motion
Particles collide with each other and the container they are in.
19
Q
- List and explain the three factors that increase the solubility (dissolving)) rate of a substance.
A
Solute size rate because more surface area.
Temperature rate because more Ke particles collide more.
Stirring rate because it brings fresh solvent in contact with solute.
20
Q
- Explain how salt dissociates in water.
A
H+ of water attract CL-
0-2 of water attract NA+
Attractive force pulls ions away from crystal
Water surrounds each in + continues until all ions are separated.
