Ch 12 Section 1 Flashcards Preview

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Flashcards in Ch 12 Section 1 Deck (58):
1

Soluble: capable of

being dissolved

2

A solution is a homogenous mixture of

two or more substances in a single phase

3

in a solution, atoms, molecules, or ions are thoroughly mixed, resulting in a mixture that has

the same composition and properties throughout

4

in the simplest type of solution, the particles of one substance are randomly

mixed with the particles of another substance

5

the dissolving medium in a solution is the

solvent

6

the substance dissolved in a solution is the

solute

7

the solute is generally designated as that component of a solution that is of

lesser quantity

8

in a solution, the dissolved solute particles are so small that they

cannot be seen

9

the dissolved solute particles remain mixed with the solvent ...., so long as the existing conditions remain..

indefinitely; unchanged

10

the solute particle dimensions are those of atoms, nmolecules and ions which range from about

0.01 to 1 nm in diameter

11

solutions may exist as

gases, liquids, or solids

12

many alloys are solid solutions in which the atoms of two or more

metals are uniformly mixed

13

by properly choosing the proportions of each metal in the alloy, many desirable properties can be

obtained

14

alloys can have higher ... and greater resistance to ... than the pure metals

strength; corrosion

15

if the particles in a solvent are so large that they settle out unless the mixture is constantly stirred or agitated, the mixture is a

suspension

16

gravity pulls the particles in a suspension to the

bottom of the container

17

partivles over 1000 nm in diameter---1000 times as large as atoms, molecules, or ions--- form

suspensions

18

the particles in a suspension can be separated from heterogenous mixtures by

passing the mixture through a filter

19

particles that are intermediate in size between those in solutions and suspensions form mixtures known as

colloidal dispersions (colloids)

20

particles between 1 nm and 1000 nm in diameter may form

colloids

21

the particles in a colloid are small enough to be suspended throughout the solvent by the constant movement of the

surrounding molecules

22

the colloidal particles make up the

dispersed phase

23

the water is the

dispersing medium

24

emulsion and foam refer to specific types of

colloids

25

many colloids appear homogenous because the individual particles cannot be

seen

26

the particles in colloids are large enough to

scatter light

27

tyndall effect occurs when light is scattereed by colloidal particles dispersed in a

transparent medium

28

the tyndal effect is a property that can be used to distinguish between a

solution and a colloid

29

the individual particles of a colloid can be detected under a microscope if a bright light is cast on the speciment at a

right angle

30

the particles in colloids are seen to move

rapidly in a random motion

31

this motion is due to collisions of rapidly moving molecules and is called

Brownian motion

32

substances that dissolve in water are classified according to whether they yield

molecules or ions in solution

33

when an ionic compound dissolves, the positive and negative ions separate from each other and are

surrounded by water molecules

34

these solute ions are free to move, making it possible for an electric current to

pass through the solution

35

a substance that dissolves in water to give a solution that conducts electric current is called an

electrolyte

36

a solution containing neutral solute molecules does not conduct electric current because it does not contain mobile

charged particles

37

a substance that dissolves in water to give a solution that does not conduct an electric current isi called a

nonelectrolyte

38

the elctrodes are conductors that are attached to a power supply and that make electric

contact with the test solution

39

for a current to pass through the light bulb filament the test solution must provide a conducting path between the two

electrodes

40

a nonconducting solutionis like an open switch between the electrodes and there is no

current in the circuit

41

the light bulb glows brightly if a solution that is a good conductor is

tested

42

for a moderately conductive solution the light bulb is

dim

43

gas-gas solution example

oxygen in nitrogen

44

gas-liquid solution example

carbon dioxide in water

45

liquid-liquid solution example

alcohol in water

46

liquid-solid solution example

mercury in silver and tin (dental amalgam)

47

solid-liquid solution example

sugar in water

48

solid-solid solution example

copper in nickel (Monel alloy)

49

sol colloid- solid dispersed in liquid example

paints, mud

50

gel colloid- solid network extending throughout a liquid example

gelatin

51

liquid emulsion colloid- liquid dispersed in liquid example

milk, mayonnaise

52

foam colloid- gas dispersed in liquid example

shaving cream, whipped cream

53

solid aerosol collid-solid dispersed in gas example

smoke, airborne particulate matter, auto exhaust

54

liquid aerosol colloid-liquid dispersed in gas example

fog, mist, clouds, aerosol spray

55

solid emulsion colloid- liquid dispersed in solid example

cheese, butter

56

salt solution--

electrolyte solute

57

sugar solution--

nonelectrolyte solute

58

hydrochloric acid solution--

electrolyte solute