Phy Sci chapter eight Flashcards Preview

Flashcardlet > Phy Sci chapter eight > Flashcards

Flashcards in Phy Sci chapter eight Deck (87):
0

An oatmeal raisin cookie is an example of a what

Heterogenous mixture

1

What determined whether a mixture is a suspension or a colloid

The size of the particles

2

Chlorine, which is used in swimming pools to kill bacteria, is a what

Solute

3

Which of the following is a solution
A. Air
B. Wood
C. Snow
D. Orange juice

Air

4

Pennies minted after 1984 contain 97.5% zinc and 2.5% copper
These coins are examples of what

Alloys

5

Two liquids that form a heterogenous mixture are said to be

Immiscible

6

What is a method for separating a solution of miscible liquids

Distilling

7

Which of the following is an example of a homogenous mixture
A. Fog
B. Gasoline
C. Paint
D. Grapefruit juice

Gasoline

8

Particles in a what can be separated by filtration

Suspension

9

The Tyndall effect in observed in

Colloids

10

What is a heterogenous mixture

It doesn't have a fixed composition

11

What do particles in a suspension do
What size are they

Settle out
Large

12

A mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gas

Suspension

13

What may particles in a suspension do

Settle over time
Be filtered out

14

Liquids that do not mix with each other

Immiscible

15

Process of luring a less dense liquid off a denser liquid

Decanting

16

What is declaring used for

To separate two immiscible liquids

17

What are the size of particles in a colloid
What does this mean

Too small
They can't settle out

18

A mixture consisting of tiny particles that are intermediate in size between those in solutions and those in suspensions and that are suspended in a liquid, solid, or gas

Colloid

19

What are particles in a colloid large enough for

To scatter light that passes through

20

What does the Tyndall Effect state

That particles in a colloid are large enough to scatter light that passes through

21

What can some immiscible liquids form

Colloids

22

Any mixture of two or more immiscible liquids in which one liquid is dispersed in the other

Emulsion

23

What is a homogenous mixture

It looks uniform even when you examine it under a microscope because the individual complements of the mixture are too small to be seen

24

What is special about the ions in salt water

The number of ions is the same everywhere

25

Are homogenous mixtures solutions

Yes

26

A homogenous throughout which two or more substances are uniformly dispersed

Solution

27

In a solution, the substance that dissolves in the solvent

Solute

28

In a solution, the substance in which the solute dissolves

Solvent

29

What is not a homogenous mixture

Milk

30

What do miscible liquids mix to from

Solutions

31

Liquids that form a single layer when mixed

Miscible

32

A method used to separate miscible liquids that have different boiling points

Distillation

33

What do liquid solutions sometimes contain none of

Water

34

A liquid solution of gasoline, diesel fuel, and kerosene

Petroleum

35

Other states of matter can also form what

Solutions

36

What is the air a solution of

Nitrogen
Oxygen
Argon
Other gases

37

A solution of mercury dissolved in silver

Amalgam

38

The substance that there is the most amount of

Solvent

39

The substance that there is the least amount of

Solute

40

Solids can dissolve in what

Other solids

41

A solid or liquid mixture of two or more metals

Alloy

42

Why is water called the universal solvent

Because many substances can dissolve in water

43

Water can dissolve what

Ionic compounds

44

What is water

A polar compound

45

Describes a molecule in which the positive and negative charges are separated

Polar

46

What do water molecules attract

Both positive ions and negative ions

47

What do polar water molecules pull apart

Ionic crystals

48

The partially negative oxygen atoms of water molecules attract what

The positively charged sodium ions

49

What does dissolving depend on

The forces between particles

50

What must be forces between the solvent molecules and the particles of the substance be grape after than

The force between the particles in the crystal

51

What kind of compound does water dissolve many of

Covalent (molecular)

52

Water forms hydrogen bonds with what

Molecular compounds such as sugar

53

The intermolecular force occurring when a hydrogen atom that is bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule

Hydrogen bond

54

What does "like dissolves like" mean

A solvent will dissolve substances that have molecular structures that are like the solvent's structure

55

What will usually not dissolve in water

Nonpolar compounds

56

Describes a molecule in which the centers of positive and negative charge are not separated

Nonpolar

57

Nonpolar solvents are used to dissolve what

Nonpolar materials

58

Why do substances dissolve

The energy transferred from the solvent to the solute, as well as the attractive forces between the solvent and solute molecules, causes molecules at the surface of the crystal to dissolve

59

What kind of solutes dissolve faster

Solutes with a large surface area

60

What helps the solute dissolve faster

Stirring of shaking a solution

61

What particles diffuse throughout the solution faster

Dissolved solute particles

62

More what particles can dissolve

Solute

63

When do solutes dissolve faster

When the solvent is hot

64

What affects the physical properties of a solution

Solutes

65

What increases the boiling point of a solution

Solutes

66

What lowers the freezing point of a solution

Solutes

67

What is solubility

The maximum mass of a solute that can dissolve in 100g of a solvent at a certain temperature and standard atmospheric pressure

68

The ability of a substance to dissolve in another at a given temperature and pressure

Solubility

69

Different substances have different what

Solubilities

70

How much of a substance is in a solution

To express how much of a substance can dissolve in a solvent, you need to use the concentration

71

The amount of a particular substance in a given volume of a mixture, solution, or ore

Concentration

72

What kind of solution has a large amount of solute

Concentrated

73

What kind of solution has only a small amount of solute

Dilute

74

What happens when you add more solute to a saturated solution

In a saturated solution, the dissolved solute is in equilibrium with undissolved solute
If you add more solute, it just settles to the bottom of the container

75

A solution that cannot dissolve any more solute under the given conditions

Saturated solution

76

Unsaturated solutions can become what

Saturated

77

A solution that contains less solute than a standard solution does and that is able to dissolve additional solute

Unsaturated solution

78

Doing what to a saturated solution can dissolve more solid

Heating

79

The solubility of most solutes increases with what

Temperature

80

A solution that holds more dissolved solute than is required to reach equilibrium at a given temperature

Supersaturated solution

81

How do you make a supersaturated solution

You raise the temperature of a solution, dissolve more solute, then let the solution cool again

82

What affects the solubility of gases

Temperature and pressure

83

Gaseous solutes are what in warmer water

Less soluble

84

Gases are more soluble under what

High pressure

85

How do you describe how much of a solute is in a solution

One of the most common ways of expressing the concentration of a solution is molarity

86

A concentration unit of a solution expressed in moles of solute dissolved per liter of solution

Molarity

Decks in Flashcardlet Class (81):