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Quick links to applets

Clicking on a link will open the applet in a new window. See below for a preview and description of each applet.

Periodic Table

Qualitative Analysis of Anions

Qualitative Analysis of Cations

Enthalpy and Hess's Law

Kinetics Plot

Meterstick Spectroscope

Hydrogen Energy Levels

Spectral Colors

Electrons-in-a-box

Linear Least Squares

Periodic Table
Periodic Table screen shot

You can use the Periodic Table applet to look up information about an element, to learn about periodic trends, or as a molar mass calculator. You can also test your knowledge of the periodic table with an element jigsaw puzzle.

Run Periodic Table Applet

Qualitative Analysis of Anions
Qualitative Analysis of Anions Applet

This applet is used in week 1 of Chem 5 and simulates the laboratory experiment to identify samples of unknown anions. You can use laboratory reagents to test known and unknown samples on the web-based lab bench. The anions included in the experiment are bicarbonate (HCO3-), chloride (Cl-), sulfate (SO42-), and iodide (I-).

Run Qualitative Analysis of Anions Applet

Qualitative Analysis of Cations
Qualitative Analysis of Cations Applet

This applet is used in week 2 of Chem 5 and simulates the laboratory experiment to identify samples of unknown metal cations. You can use laboratory reagents to test known and unknown samples on the web-based lab bench, with the same user interface as the anion applet. The cations included in the experiment are lead (Pb2+), silver (Ag+), copper (Cu2+), iron (Fe2+), nickel (Ni2+), and manganese (Mn2+). Analysis is performed using a sulfide precipitation scheme.

Run Qualitative Analysis of Cations Applet

Enthalpy and Hess's Law
Enthalpy and Hess's Law Applet

This applet is used in week 5 of Chem 5 lab. The applet allows you to test possible chemical reactions and decide which ones can be used with Hess's Law to determine the heat of formation of magnesium oxide. It also includes enthalpy diagrams and other thermodynamic cycles, such as the Born-Haber cycle for sodium chloride.

Run Enthalpy and Hess's Law Applet

Kinetics Plot
Kinetics Plot Applet

This applet is used in week 1 of Chem 6. The applet allows you to enter kinetic data and plot absorbance or concentration vs. time, natural log of concentration vs. time, or the inverse of concentration vs. time. This will allow you to quickly evaluate the reaction order since these are the expected linear plots for zero, first, and second order reactions, respectively.

Run Kinetics Plot Applet

Atomic Spectra
Atomic Spectra Applet

These two applets are used in week 4 of Chem 6. The first applet shows a schematic diagram of a meterstick spectroscope. You can move the eye of an observer until a spectral line is viewed and clearly see the geometry of the experiment. You can also look at the spectra of the different elements available in the lab that week, to see how they compare.

Run Meterstick Spectroscope Applet

The second applet shows the energy levels for an electron in a hydrogen atom. Using an interactive energy level diagram, you can examine transitions between different energy levels and see where the emitted light would appear in the observed spectrum of the element.

Run Hydrogen Energy Levels Applet

Spectral Colors
Spectral Colors Applet

This applet allows you to manipulate the absorbance or transmission vs. wavelength plot of a visible absorption or transmission spectrum and observe the color of a solution with the spectrum that you create.

Run Spectral Colors Applet

Electrons-in-a-box
Electrons-in-a-box Applet

This applet provides an interactive energy level diagram for a one-dimensional particle-in-a-box. You can change the length of the box, the mass of the particle, and the number of electrons confined to the potential "box" to model the ground and excited state of different conjugated dye molecules. You can also plot the one dimensional wavefunctions for each energy level.

Run Electrons-in-a-box Applet

Linear Least Squares
Linear Least Squares Applet

This applet allows you to enter data and calculate the equation of the best straight line through the points. The equation of the line is calculated using a least squares method and the uncertainties in the slope and intercept are also calculated. You can also move the line to compare a fit "by eye" to the least squares fit.

Run Linear Least Squares Applet

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