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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
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Qualitative Analysis of Anions | |
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This applet is used in week 1 of Chem 3/5 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
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Qualitative Analysis of Cations | |
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This applet is used in week 2 of Chem 3/5 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
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This applet is used in week 5 of Chem 3/5 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
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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
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This applet is used in week 3 of Chem 6 and consists of two parts. The first part 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.
The second part of the 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 Atomic Spectra Applet
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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
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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
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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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