Physical Properties Of Compounds

Question 1

What is the shape of an ionic solid? Why can’t they conduct?

Answer 1

Crystal lattice. Due to stability, not enough movement for charges (ions or electrons) to flow.

Question 2

What does ionic solids maximize and minimize (respectively)?

Answer 2

Attractive forces and repulsive forces.

Question 3

Why can Ionic liquids conduct electricity? What is it caused by?

Answer 3

Freely moving ions caused by no defined arrangement of ions.

Question 4

Ionic liquids are less stable, so what increases?

Answer 4

Repulsion forces

Question 5

True or False, Ionic solids are soluble in water.

Answer 5

True

Question 6

What is dissociation of an ionic solid?

Answer 6

Ions are separated and surrounded by water molecules.

Question 7

What is the “cage” of water molecules called?

Answer 7

Solvation shell

Question 8

What is the partially negative oxygen attracted to? And the partially positive hydrogen? (Respectively)

Answer 8

Cation, anion

Question 9

Transition question: what are the 3 intramolecular forces?

Answer 9

Metallic, covalent, Ionic

Question 10

Do molecular solids conduct electricity? Why?

Answer 10

No, they are neutral, total charge is 0

Question 11

What INTERmolecular force do molecular solids MAXIMIZE?

Answer 11

Attractive forces

Question 12

Do molecular solids have high or low melting points?

Answer 12

Low

Question 13

Do molecular liquids conduct electricity?

Answer 13

No

Question 14

True or false, polar molecules have higher melting point

Answer 14

True

Question 15

Do molecular solids undergo dissociation? What happens then?

Answer 15

No, they stay together in chunks and surrounded my water molecules.

Question 16

Are molecular solutions conductive?

Answer 16

No

Question 17

True or False: some molecular solids dissolve IF POLAR

Answer 17

True, only some are soluble

Question 18

Do metallic solids conduct electricity? Why?

Answer 18

Yes, electrons are freely moving.

Question 19

What is the range of metallic melting point?

Answer 19

Higher than molecular, lower than ionic

Question 20

Do metals conduct as a liquid?

Answer 20

Yes

Question 21

Can metals dissolve in water?

Answer 21

No

Question 22

Do metals dissolve in polar or non polar solutions? Why?

Answer 22

Non polar because metallic bonds are non polar

Question 23

Do network covalent solids conduct?

Answer 23

No, they don’t conduct in any form, even liquids

Question 24

What is the shape of network covalent solids?

Answer 24

ATOMS linked by strong covalent bonds

Question 25

How does each atom in a network covalent solid bond?

Answer 25

Each atom covalently bonds to all atoms around it

Question 26

Are network covalent solids soluble?

Answer 26

No

Question 27

True or false: non polar dissolves non polar and polar dissolves polar

Answer 27

True

Question 28

What determines solubility?

Answer 28

Polarity of solute and solvent

Question 29

What dissolves in water? (What type of compounds?)

Answer 29

Polar and ionic

Question 30

Are there intermolecular interactions in gas?

Answer 30

No

Question 31

List 4 reasons for higher BP/MP

Answer 31

1. Stronger Intermolecular forces
2. More electrons
3. Larger surface area
4. More polar