Chemistry U4 Test Prep

What three things affect the rate of dissolving in a solution?

1. Particle size

2. Agitation (stirring)

3. Temperature

Describe three properties of covalent bonds:

1. Non-conductive

2. Sometimes soluable in water

3. Low melting point

Describe three properties of ionic bonds:

1. Conductive in solution

2. Soluable

3. High melting point

Describe three properties of metallic bonds:

1. Conductive

2. Not soluable

3. High melting point

Intramolecular force:

Forces within a molecule

Ex: Covalent and ionic bonding

Intermolecular force:

Forces between molcules

Ex: London dispersion forces, Hydrogen bonding

How could you determine if covalent compounds are polar or nonpolar covalent?

1. Solutability + like dissolves like rule

2. Calculating bond polarity

3. Drawing dipole moments

4. Considering VESPR shape

In Hydrogen Bonding (Intermolecular force), what other elements is hydrogen attracted to besides oxygen?

Nitrogen and Fluorine

London dispersion forces:

Momentary attractions between molecules because of temporary dipoles

Dipole-dipole forces:

When charged ends of the dipole are attracted to oppositely-charged dipoles on other molecules

Hydrogen bonding forces:

When the negatively-charged oxygen, nitrogen, or fluorine atom in one water molecule is attracted to the positively-charged hydrogen atoms in another water molecule