| General
Chemistry |
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In the VSEPR
applet you use valence shell electron
pair repulsion theory to determine the
molecular shape and polarity of covalent
molecules. Includes a Lewis structure
drawing pad. |
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Periodic
Puzzle
is more than your average periodic table
jigsaw puzzle. Do you know your halogens?
How about your alkaline earths or your
transition metals? You can also color the
table by numbers - by the values of
physical and chemical properties -
electronegativity, density, atomic
number, oxides, halides, and many more.
All this and a molar mass calculator,
too! |
French - Français
|
Puzzle Périodique
en français! |
| Qualitative
Analysis |
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In the Anion Puzzle
you have the opportunity to test your
inorganic qualitative analysis skills. |
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In the Cation Puzzle
you have the opportunity to test your
inorganic qualitative analysis skills. |
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Can
you mix the four reagents in the Redox Mystery
in the right order so that they change
from colorless to yellow, to blue, and
back to colorless? Now, what is in each
bottle? |
| Data
Analysis |
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Students can check their
lab report calculations and significant
figures with the Report
Check applet. |
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This demonstration of the Report
Check applet shows its plotting
capabilities. |
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The Linear
Least Squares applet allows
you to quickly fit a least-squares line
to a set of data. Output includes 95%
confidence intervals for the slope and
intercept estimates. Also try your hand
at a manual fit. Does your best fit by
eye match with the least-squares fit? |
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Is the rate of your
reaction 0th order, 1st order, or second
order? Find out with the Kinetics
Plot applet.
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| Quantum
Mechanics |
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The Spherical
Harmonics applet: a
different (and better?) way of viewing
these important angular wave functions. |
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What's a particle to do
when it's stuck in a square? View its
wave functions with the Particle
in a Square applet. |
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Do two waves add to a
twice-as-big wave? Or can they add to
nothing? Take a look at the Wave
Superposition applet. |
| Spectroscopy |
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Explore atomic
spectroscopy using this Meterstick Spectroscope
simulation. See how you can
determine the emission spectra of
hydrogen and other elements with a
diffraction grating, a meterstick, and a
little trigonometry.
|
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Further explore atomic
spectroscopy by looking at the
interactive Hydrogen Energy
Level
diagram and try to find which energy
transitions give the visible spectral
lines that you observed with the
spectroscope. That's right, those are the
lines of the Balmer series!
|
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It seems like a
one-dimensional life for some Electrons in a
Box.
They seem to be stuck in the conjugated
bonds of a dye, but they still have
energy levels and wave functions. This
applet is designed for use with a
conjugated dye molecular spectroscopy
laboratory.
|
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Does blue plus yellow
really make green? In Spectral
Colors you
can make colors appear from the
transmission or absorption spectrum of a
solution.
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| Thermodynamics |
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In Enthalpy
Puzzles
you can't get there from here, at least,
not directly. How can you add indirect
reactions to get to the desired products?
And what does this have to do with Hess's
Law? Once you've figured out how to get
there, you get to create a map of the
reagents on an enthalpy diagram. The
enthalpy of formation for magnesium oxide
is just one of the puzzles.
|
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How do the Pressure-Volume
Isotherms
for an ideal gas differ from those for a
van der Waals gas? Wait a minute, what is
a pressure-volume isotherm?
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What is the Carnot Cycle? Look at this
pressure-volume
illustration of an ideal heat engine.
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| Kinetics |
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In
this exercise using the kinetics modeling
applet, you can Connect
Kinetics and Equilibrium
by modeling reversible, first-order
reactions. |
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Is the rate of your
reaction 0th order, 1st order, or second
order? Find out with the Kinetics
Plot applet.
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