Test Unit 2 Matter

Question 1

8. The color of ink is a

Answer 1

Physical properties

Question 2

9. Three examples of a physical change are

Answer 2

Burning of gasoline , rotting an egg and exploding fireworks.

Question 3

10. In a solution, the substance that is being dissolved is

Answer 3

Solute

Question 4

11. Which of the following is not a physical property

Answer 4

State

Question 5

17. In which phase of matter are the molecules of the substances farthest apart from each other.

Answer 5

Gas

Question 6

19. 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.

Answer 6

Average kinetic energies

Question 7

29. Which of the following liquids would be the most viscous.

Answer 7

Syrup

Question 8

31. Saltwater

Answer 8

Homogeneous

Question 9

33. Salad dressing

Answer 9

Heterogeneous

Question 10

36. Fragrance of a flower

Answer 10

Physical property

Question 11

37. Burning popcorn and making water

Answer 11

Chemical change

Question 12

44. How many grams of NaCIO are needed to make a saturated solution in 100g of water at 90C

Answer 12

180g

Question 13

45. In terms of saturation, how would you classify a KBr solution with a concentration of 90g in 100g of water at 10C

Answer 13

Supersaturated

Question 14

48. The solubility of which salt is the least affected by temperature.

Answer 14

NACL

Question 15

49. Label the five parts of the heating curve

Answer 15

1. solid
2. Melting - heat of fusion
3. Liquid
4. Boiling pt - heat of vaporization
5. gas

Question 16

50. Label the states of matter.

Answer 16

Sublimation
Condensation
Freezing

Question 17

52. Bose - Einstein condensates are used to simulate condensations in a

Answer 17

Black hole

Question 18

54. List the three points in the kinetic- molecular theory.

Answer 18

All matter is made of particles
Particles are in constant random motion
Particles collide with each other and the container they are in.

Question 19

55. List and explain the three factors that increase the solubility (dissolving)) rate of a substance.

Answer 19

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.

Question 20

60. Explain how salt dissociates in water.

Answer 20

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.