Intermolecular Forces Practice Key PDF

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Dr. Mariia Bauman...

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1. Choose the bond or attraction described for each below: IMFs are attractions between molecules. Bonds hold atoms together in a molecule. A. polar covalent bond B. nonpolar covalent bond C. ionic bond D. metallic bond E. dispersion force F. dipoledipole force G. hydrogen bonding force

IMF? Y or N

Type (A-G)

Description of bond or attractive force

N

A

1. What is holding the atoms together in an HF molecule

Y

E

2. What is holding two Br2 molecules together in Br2(l).

N

C

3. What is holding the ions together in CuCl2.

Y

G

4. What is holding two H2O molecules together.

N

D

5. What is holding the atoms together in a sample of Cu.

N

B

6. What is holding the atoms together in an O2 molecule.

Y

F

7. What is holding two OF2 molecules together.

2. Indicate the strongest type of intermolecular force (Dispersion, Dipole-Dipole or Hydrogen bond) between the molecules in the following:

Polar or Nonpolar? Strongest Intermolecular Force

A. CCl4 Nonpolar

Dipersion

B. NH3 Polar

H-bond

C. HCl Polar

Dipole

D. OF2 Polar

Dipole

3.Pr e di c twhi c hc ompoundi ne a c hpa i rwi l lha v et hehi ghe rme l t i n gpoi nt . ( a )CS2 orCCl s t r o n g e rLon d o nf o r c e s ;b o t ha r en o n p o l a r ) 4( ( b)HIorKI( i o n i cb on d s ;HIh a sd i p ol e d i p ol ei n t e r a c t i o n s ) rF2( ( c )Cl s t r o n g e rLo n d onf o r c e s ;b o t ha r en on p ol a r ) 2o rH2O(( ( d)Na i o n i cb o n d s ;H2Oh a sh y d r o g e nb o n di n g ) 2O o O2 orCO2( ( e )Si n e t wo r kc o v a l e nt ,s oc o v a l e n tb o n d swo u l db eb r o k e n;CO2h a s Lo n d o nf o r c e s )

( f )CH4 orNH3 ( h y d r o g e nb o n d i n g ;CH4h a so nl yLo n d onf o r c e s ) rCF4( ( g)CHCl d i po l e d i po l ei n t e r a c t i o ns ;on l yLo n d o nf o r c e sf o rCF4) 3o ( h)Ca F2 orHF( i o n i cb o n d s ;HFh a si nt e r mo l e c u l a rf o r c e so n l y( h y d r o g e nb o n d i n g ) ) ( i )BF rP s t r o n g e rLo n d onf o r c e s ;b o t ha r en on p ol a r ) 3 o 4(...