Chapter 2: Physical properties and attractive forces

Question 1

The physical properties of ionic compounds and their bonds

Answer 1

Forces: Ion-Ion
Melting point: high
Boiling point: high

Question 2

What are ion-ion forces?

Answer 2

strong differences in electronegativity. Highest form of forces

Question 3

IMF Vaan der waal forces? what are three different types?

Answer 3

Dipole- Dipole forces: for organic molecules with a uneven disruption of bonding electrons (highly polarized) . Molecules arrange themselves to where they the positive end is directed to negative.

Hydrogen bonding: hydrogen bonded to NOF. They are weaker bonds than normal covalent bonds but stronger than dipole-dipole

LDF: Small temporary charges. The strength of the pull depends on surface area and the shells an atom have

Question 4

How to determine the force of LDF?

Answer 4

Surface area: The flatter, the longer, the spherical the greater the pull

Shells: the more shells the greater the pull

Question 5

What factors effect boiling point

Answer 5

• strength of LDF
• Molecule weight
• Surface Area

Question 6

What are the general rules of solubility psychically?

Answer 6

• Polar and ionic solids are usually soluble in polar solvents.
• Polar liquids are usually miscible.
• Nonpolar solids are usually soluble in nonpolar solvents.
• Nonpolar liquids are usually miscible.
• Polar and nonpolar liquids, like oil and water, are usually not soluble to large extents.

Question 7

Guidelines for water solubility?

Answer 7

For a compound that is hydrophllic:
* Compounds with one to three carbon atoms are water soluble.
* Compounds with four or five carbon atoms are borderline.
* Compounds with six carbon atoms or more are insoluble.

Question 8

Rank the strength of all forces:

Answer 8

cation-anion: very strong
Covalent bond: strong
Ion-dipole: Moderate
Dipole-Dipole: weak

Question 9

Edited: Van der waals forces

Answer 9

nonpolar covalent bonds

Question 9

Edited: Van der waals forces

Answer 9

nonpolar covalent bonds

Question 10

Edited: dipole-dipole

Answer 10

polar covalent bonds check if there is a dipole moment.

Question 11

Edited: Ion-Ion

Answer 11

Atoms with different formal charges

Question 12

Edited: Rank the forces from highest melting point to lowest

Answer 12

1. ion-ion
2. Hydrogen bonding
3. dipole-dipole
4. Van deer waals

Question 13

Edited: The larger the atom the blank the van deer waal forces

Answer 13

stronger