Short Notes on Intermolecular Forces Worksheet
Name: ________________
Period: ___________
1. What is the force of attraction between molecules of the following substances?
a) PCl3
e) HCl
b) NiCl2
f) CH3OH(this is different than your copy)
c) I2
g) H3PO4
d) HF
h) BF3
2. Rank the strength of the following compounds from strongest to weakest: PCl 3, NiCl2, I2, HF
3. Rank the following ionic compounds according to the strength of their ion-ion forces of
attraction: NiCl2, Fe2O3, MgO, KI, BeF2, CrCl3
4. Rank the following from strongest to weakest intermolecular forces: Cl2, CH4, BF3, SCl2, CO2
5. Which of the following compounds are likely to dissolve in water?
a) SCl2
b) O2
c) NaCl
d) CO2
e) PH3
6. Which of the following will dissolve in C6H14 (hexane)?
a) SCl2
b) O2
c) NaCl
d) CO2
e) PH3
7. Rank the following substances from highest melting point to lowest melting point: KNO 3, H2O,
N2O, NaCl, F2, Cl2
8. Rank the following substances from highest boiling point to lowest boiling point: CaS, HNO3,
KBr, SO2, XeF4
9. Rank the following substances from highest vapor pressure to lowest vapor pressure: Br 2, NH3,
Ar, PCl3, PCl5
10. Rank the following substances from highest viscosity to lowest viscosity: Br2, H2O, CCl4, PH3
11. Rank the substances from the previous example from highest surface tension to lowest
surface tension.
Solution 1:
a.
b.
c.
d.
e.
f.
g.
h.
dipole-dipole forces
ion-ion forces
London (or dispersion) forces
hydrogen bond
dipole-dipole
dipole-dipole
hydrogen bond
London (or dispersion) forces
Solution 2: NiCl2 > HF > PCl3 > I2
Solution 3: Fe2O3 > MgO > CrCl3 > BeF2 > NiCl2 > KI
Solution 5:
a.
b.
c.
d.
e.
Dissolves in water
Not soluble in water
Soluble in water
Not soluble in water
Dissolves in water
Solution 6: O2 and CO2 are soluble in hexane.
Solution 7: NaCl > KNO3 > H2O > N2O > Cl2 > F2
Solution 8: CaS > KBr > HNO3 > SO2 > XeF4
Solution 9: Ar > Br2 > PCl5 > PCl3 > NH3
Solution 10: H2O > PH3 > Br2 > CCl4
Solution 4: SCl2 > Cl2 > BF3 > CO2 > CH4
Solution 11: H2O > PH3 > Br2 > CCl4