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<b>Quiz 2 - Week of Feb. 19: Chapters 5, 6, 7.1-7.6, 8 and 9.1-9.2.</b><br>
<br>
The following info. can also be found at the "Quizzes" link and may
be<br>
easier to follow there,<br>
<tt><br>
<a class="moz-txt-link-freetext"
href="http://chemistry.osu.edu/%7Erzellmer/chem1250/quiz/quiz_1250.htm">http://chemistry.osu.edu/~rzellmer/chem1250/quiz/quiz_1250.htm</a><br>
</tt><br>
<br>
<b>Chapter 5:</b><br>
<br>
<b>We did not cover section 5.8 in the 10th-13th editions.<br>
<br>
For the</b><b>14th ed. we ARE covering 5.8 as part of chapter 8
and<br>
not covering section 5.9.</b><br>
<br>
Nature of energy, system and surroundings, work, heat, first law of<br>
thermodynamics, internal energy (E), state functions, enthalpy (H),<br>
how enthalpy is related to internal energy, how both are related to<br>
heat and work, what does endothermic and exothermic mean and how the<br>
signs of delta(E) and delta(H) are related to these and does this<br>
mean if heat is a reactant or product, enthalpies of reaction,<br>
calorimetry, heat capacity and specific heat, Hess's Law, enthalpies<br>
of reaction, enthalpies of formation (delta(H_f)), how they are<br>
defined and how to use them to calculate enthalpies of reaction.<br>
<br>
For those of you using the 14th edition the quiz covers sections
5.1-5.7<br>
and 5.8 (see ch 8 below for details and homework).<br>
You should be able do to homework problems 5.1-5.12, 5.13-5.80,<br>
5.99-5.112(a-b), 5.113, 5.118-5.126<br>
<br>
For those of you using the 13th edition the quiz covers sections
5.1-5.7<br>
You should be able do to homework problems 5.1-5.12, 5.13-5.80,<br>
5.91-5.106(a-b), 5.107, 5.112-5.118<br>
<br>
For those of you using the 12th edition the quiz covers sections
5.1-5.7<br>
You should be able do to homework problems 5.1-5.12, 5.13-5.80,<br>
5.91-5.106(a-b), 5.107, 5.112-5.118<br>
<br>
For those of you using the 11th edition the quiz covers sections
5.1-5.7<br>
You should be able do to homework problems 5.1-5.10, 5.11-5.78,<br>
5.87-5.105(a-b), 5.106, 5.112-5.119<br>
<br>
For those of you using the 10th edition the quiz covers sections
5.1-5.7<br>
You should be able do to homework problems 5.1-5.8, 5.9-5.78,<br>
5.87-5.101(a-b), 5.102, 5.108-5.115<br>
<br>
<br>
<b>Chapter 6:</b><br>
<br>
Nature of light, understand what wavelength and frequency are and
how the<br>
are related, electromagnetic spectrum (rough idea of the wavelengths
and<br>
frequencies of various regions and the end limits for the visible
region),<br>
relationship between energy, frequency and wavelength, line spectra
and<br>
Bohr model, energy states of the Hydrogen atom, Rydberg eqn., wave
nature<br>
of matter, uncertainty principle, quantum mechanics (orbitals and<br>
quantum numbers), representations of orbitals (probability density,<br>
radial probability functions, how many peaks and nodes in these
functions,<br>
contour representations - shapes of the orbitals), electron
configurations,<br>
orbital diagrams, electron-dot (Lewis) symbols, exceptions to
electron<br>
config (Cu, Ag, Au, Cr, Mo).<br>
<br>
You should be able do to any homework problem in ch 6.<br>
<br>
<br>
<b>Chapter 7 (7.1-7.6):</b><br>
<br>
Understand Z_eff (effective nuclear charge - don't worry about
Slater's Rules<br>
for Z_eff in the closer look box in section 7.2), atom and ion
sizes, IE, EA,<br>
and their trends in the periodic table, be able to explain these<br>
trends, be able to explain exceptions (mostly seen for groups 2A and
5A).<br>
Be able to explain general properties of nonmetals, metalloids and
metals.<br>
<br>
<b>We skipped Sections 7.7-7.8.</b><br>
<br>
For those of you using the 14th edition do homework problems
7.1-7.66<br>
7.79-7.107, 7.109-7.110, 7.115<br>
<br>
For those of you using the 13th edition do homework problems
7.1-7.66<br>
7.79-7.107, 7.109-7.110, 17.115<br>
<br>
For those of you using the 12th edition do homework problems
7.1-7.68,<br>
7.83-7.103, 7.105-7.106, 7.112<br>
<br>
For those of you using the 11th edition do homework problems
7.1-7.68,<br>
7.83-7.102, 7.105-7.106, 7.111<br>
<br>
For those of you using the 10th edition do homework problems
7.1-7.64,<br>
7.79-7.99, 7.104-7.105, 7.110<br>
<br>
<br>
<b>Chapter 8:</b><br>
<br>
Lewis symbols and "octet" (noble-gas) rule, ionic bonding, lattice<br>
energy (be able to calculate it but also understand the relationship<br>
between LE, charge, size of ions and melting point), Born-Haber
cycle,<br>
electron-config. for ions (which electrons come out first), covalent<br>
bonding, electronegativity (EN) and bond polarity, dipoles and
dipole<br>
moments, differentiating between ionic and covalent bonding (see
notes<br>
for how to do this based on differences in EN), Lewis structures<br>
(including resonance structures and exceptions to octet rule),<br>
strengths of covalent bonds (bond enthalpy calculations),
relationship<br>
between bond strength and bond enthalpy and bond length and bond
order<br>
(as given in the notes).<br>
<br>
For the 10th-14th editions you should be able do to any homework<br>
problem in ch 8.<br>
<br>
<b>For the 14th edition you should also be able do to any homework
problems</b><b><br>
</b><b>in 5.81-5.88</b><br>
<br>
<br>
<b>Sections 9.1-9.2:</b><br>
<br>
Electron-domain geometries and molecular geometries (shapes). Know
the<br>
shapes and bond angles (whether exact or approximate). Remember,
the ED<br>
geometry includes all electron pairs (lone pairs and bonding pairs,
i.e.<br>
atoms) and determines the overall molecular geometry and bond
angles.<br>
However, the molecular geom. is described by the atoms only (does
not<br>
inlcude lone pair electrons). When a question simply states "what
is<br>
the shape or geometry of a molecule it is asking about the molecular<br>
geometry (not the ED geometry). If I want you to give the ED
geometry<br>
I will specifically state that. Use VSEPR theory to predict ED and<br>
molecular geometries.<br>
<br>
For those of you using the 14th edition the quiz covers sections
9.1-9.2<br>
and homework problems 9.1-9.3, 9.13-9.34, 9.85-9.89<br>
<br>
For those of you using the 13th edition the quiz covers sections
9.1-9.2<br>
and homework problems 9.1-9.3, 9.13-9.34, 9.85-9.89<br>
<br>
For those of you using the 12th edition the quiz covers sections
9.1-9.2<br>
and homework problems 9.1-9.3, 9.6, 9.11-9.36, 9.87-9.91<br>
<br>
For those of you using the 11th edition the quiz covers sections
9.1-9.2<br>
and homework problems 9.1-9.3, 9.11-9.30, 9.75-9.78<br>
<br>
For those of you using the 10th edition the quiz covers sections
9.1-9.2<br>
and homework problems 9.1-9.3, 9.11-9.30, 9.75-9.9.78<br>
<br>
Sections 9.3-9.6: Covered in class but <b>NOT</b> on the quiz.<br>
<br>
These sections will NOT be on the quiz. I was reluctant to<br>
leave this off the quiz but the above is enough. Polarity of
molecules,<br>
valence-bond theory (and hybrid orbitals) are a bit tougher to
understand<br>
than the shapes and bond angles so I'm giving you a little more time
to<br>
study this material (and catch up). I'm relying on you to realize
you<br>
need to get through these sections before lecture next week. If
not, you<br>
will be too far behind. These sections will certainly be on the
exam.<br>
Also, for sections 9.7 and 9.8 look at the "Notes" link to see what
we<br>
are and aren't covering (we are not doing anything with the MO
diagrams).<br>
<br>
We will be in Chapter 10 next week.<br>
<br>
Polarity of molecules. This depends on the shape of the molecule
and<br>
what is attached to the molecule (atoms and lone pairs). For
instance,<br>
a tetrahedral molecular geometry (also the ED geometry) can give
nonpolar<br>
only if all four entities around the central atom are identical to
each<br>
other (such as CH4, CCl4, etc.).<br>
<br>
Valence-bond theory and hybrid orbitals and multiple bonding are in<br>
sections 9.4-9.6. This explains bonding and the shapes obtained for<br>
molecules, at least when the central atom is from row 2 (linear,<br>
trigonal planar and tetrahedral electron domains).<br>
<br>
<br>
Dr. Zellmer<br>
<br>
<br>
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