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Name:_______________________________ Date:_________________ Hr:____
AP CHEMISTRY
Ch 9 (Sect 1 & 5) – Covalent Bonding: Orbitals
QUIZ
COVALENT BONDING: ORBITALS
TOTAL:
/20
You may use your chemistry textbook, class notes, handouts, labs, or any other notes you
make. You may only collaborate with students currently enrolled in AP Chemistry at GHS. You
may not use any adults, the internet, or other electronic resources for this quiz. You may
choose not to collaborate with another student (please respect the decision of those who
choose to work on their own). Show all work with appropriate significant figures for full credit.
Free Response (20 points)
Your responses to these questions will be scored on the basis of the accuracy and relevance of
the information cited. Explanations should be clear and well organized. Specific answers are
preferable to broad, diffuse responses.
1. (3 points) Label each of the following as being paramagnetic or diamagnetic. Justify your
responses.
(a) Barium
(b) Mercury
(c) Mercury(II) ion
2. (2 points) How many of the atoms in a molecule of nitric acid must occur in the same
plane? Justify your response. (a structural formula is shown below, but lone pairs are not)
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Name:_______________________________ Date:_________________ Hr:____
AP CHEMISTRY
Ch 9 (Sect 1 & 5) – Covalent Bonding: Orbitals
QUIZ
3. (6 points) Using the data supplied, estimate the lattice energy for magnesium chloride. Be
thorough and clear in showing all of your work. Report your answer to the appropriate
number of significant figures.
Reaction or Process
kJ/molrxn
Enthalpy of formation of MgCl2
–641.3
First ionization energy of Mg
735
Second ionization energy of Mg
1445
Electron affinity of Cl
–349
Bond dissociation energy of Cl2
239
Enthalpy of sublimation of Mg
150.
4. (9 points) For each of the following species, draw valid octet satisfying Lewis structures (with
equivalent resonance structures where appropriate). Assign formal charges to each atom in
each structure. Predict the hybridization of each atom in each structure. Be sure to be neat
and organized as your present your information.
(i)
CO32-
(ii)
CO2
(iii)
CO
I affirm that the work shown on this quiz is entirely my own effort and that no resources other than those specified
were used.
____________________________________
Student Signature
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