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chemistryyyy > Unit 3 Day 1 > Flashcards

Unit 3 Day 1 Flashcards

1
Q

Intra

A

Within

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2
Q

Inter

A

Between

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3
Q

Intra or inter stronger

A

Intra(within) is stronger

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4
Q

Intra forces

IMF

A

Ionic
Covalent

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5
Q

Inter forces

IMF

A

Ion ion
Dip dip
H bond
LDF

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6
Q

Strongest lattice energy

A

Charge/ radius

High charge then small radius

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7
Q

Polar molec attract other molec

A

Electrostatically

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8
Q

Strongest dipole interactions means

A

Most polar

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9
Q

Np molec can attract other np molec

A

Electrostatically

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10
Q

Polarizability

A

Measure of how easily the electron cloud can be distorted

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11
Q

What IMF is the only one with a full charge

A

Ion ion

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12
Q

What is the only IMF type with temp dip

A

LDF

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13
Q

What does dissolving salt in water do(what imf)?

A

Ion-dip

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14
Q

All physical properties of solids and liquids are determined by?

A

IMFS

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15
Q

What IMF is for gases

A

No IMF with ideal gas

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16
Q

Strong IMF =(BP?)

A

High BP

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17
Q

Strong IMF =

VAPOR?

A

low vp

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18
Q

what determines pressure

A

The number of Molecules colliding with the wall of the vacuum box

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19
Q

What is pressure(formula)

A

Force over area

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20
Q

What is VP

A

A physical property of a liquid

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21
Q

When can VP be determined

A

The rate of condensation equals the rate of evaporation

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22
Q

Cohesive forces

A

How attracted it is to itself, attractions between same molecules

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23
Q

Adhesive forces

A

How attracted it is to container, attractions between diff molec

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24
Q

What must be true for concave meniscus

A

Adhesive forces are greater than cohesive forces

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25
Q

Which molecules has higher energy

Surface of bulk molecule?

A

Surface molecules do, they are less stable

26
Q

What is viscosity

A

Resistance to flow

27
Q

What is more viscous

(Size)

A

Larger molecules

28
Q

What is more viscous

Temp

A

Cold

29
Q

What is more viscous

Polarizability

A

More polarizable is more viscous

30
Q

Melting point

A

The temp at which imfs break and distance btwn molec increase

31
Q

4 types of solids

A

Ionic
molecular
covalent network
Metallic

32
Q

Ionic solids

A

Hard, rigid, high MP
Conduct electricity when dissolved in water
Btwn cations and anions

33
Q

Molecular solids

A

Melting points below 500k
Are brittle
Don’t conduct electricity

34
Q

Covalent network

A

Melting points above 500k, hard, insoluble in water

35
Q

High imfs =?

mp

A

High melting pt

36
Q

Metallic solids

A

Held by metallic bonds only, malleable and ductile, good thermal and electrical conductors

37
Q

What imf do ion have

A

Ion ion

38
Q

What IMF do molecular have

A

H bond, dip dip, LDF

39
Q

What bonds do covalent networks have

A

Covalent bonds

40
Q

What bonds do metallic solids have

A

Dative bonds

41
Q

Polarizability increases with?

A

Increasing number of electrons so therefore increasing size of molecules

42
Q

LDF are usually stronger for…

A

Molecules that are larger with more electrons

43
Q

What are instantaneous dipoles

A

LDF

44
Q

What IMF do all molec have

A

LDF

45
Q

What do IMFS result from

A

Attractive forces between regions of positive and negative charge density in neighboring molecules

46
Q

Coloumbs law theory

A

The closer 2 charges are(3+ and 3- vs 1+ and 1-) the stronger the force between them

47
Q

Coloumbs law equation

A

Electric force equals columb constant(k) times charge 1 and charge 2 divided by the distance btwn the 2 charges squared

48
Q

What do solid lines represent

A

Covalent bonds

49
Q

Where do h bonds happen

A

Between 2 diff molecules(inter)

50
Q

Are covalent bonds stronger than h bonds

A

Yes Intramolecular(within) is stronger than intermolecular (between)

51
Q

If a molecule is np what IMF can it have

A

ONLY dispersion

52
Q

if at same temp pressure and vol which has greater number of collisions, He or O2 and why

A

He because it is less big and therefore moves with a higher velocity

53
Q

What imf contributes to physical properties of substance

A

Intermolecular

54
Q

What imf holds molecules together

A

Intramolecular

55
Q

When adhesive forces are greater than cohesive forces, a liquid will tend to try to wet the surface. This means the liquid will maximize attractive forces my

A

Maximizing contact with the surface

56
Q

When the cohesive forces are greater than the adhesive forces, a liquid will tend to bead on the surface. The liquid will maximize attractive forces by

A

Minimizing contact with the surface

57
Q

A property of liquid thats arise because molecules at the surface have a higher energy(less stable) than the molecules in the middle of the liquid

A

Surface tension

58
Q

Round droplet means

A

Strong attractive forces, IMF

59
Q

SATP

A

1 bar and 25 degrees C

60
Q

Percent yield

A

Lab ver stcich

chemistryyyy (40 decks)

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