Virtual Chem Lab

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Rubric for Virtual Chem Lab Technology Badge
Inoganic Lab
Perform Test for Chromium
Open a Preset Lab Start Virtual ChemLab, select Descriptive Chemistry, and then select Identification of Cations in Solution Co, Cr, Cu from the list of assignments. The lab will open in the Inorganic laboratory.
Use a Test Tube Drag a test tube from the box and place it on the metal test tube stand.
Add Cations to Solution Click on the Co2+, Cr3+, and Cu2+ bottles.
Divide Make copies of your original test tube by clicking on the Divide test tube near the front of the lab bench. You may want to make several copies in case you need to start over at some point.
Add Reagent Click the NaOH bottle on the reagent shelf. Observe the reaction in the left viewing pane.
Centrifuge Click on the centrifuge machine in the near left corner of the lab bench. Notice the separation of the reagents in the test tube after it has been centrifuged.
Decant Click on the decant test tube. Notice that a new test tube of the decanted liquid appears in the test tube rack.
Verify Chromium Move the clear green test tube from the rack to the stand. Click pH 10 and add HNO3.
Perform Test for Cobalt
Add NH3 Using the original solution with cobalt and copper precipitate, add NH3. Centrifuge and decant.
Verify Cobalt Move the bright blue test tube from the rack to the stand. Add HNO3.
Perform Test for Copper
Verify Copper Move the original solution, which now only has copper precipitate, back to the stand. Add HNO3.
Screenshot Take a screenshot of your lab bench after you have completed the three tests. You should have all the test tubes you have used in your rack.
Perform Tests on an Unknown
Clear Lab You can clear the lab by either dropping the test tubes into the red disposal bucket on the right, or clicking the bucket itself to clear the entire lab.
Create Unknown Click on the “Unknowns” label. Select Co2+, Cr3+, and Cu2+ from the stockroom. Set the minimum = 0 and maximum = 3. This determines how many ions will be in your unknown. Click “Create Unknown.”
Edit Label Change the label on your unknown test tube to your name.
Perform Tests Using the previous methods, test for each ion in the solution.
Check Answers Click on the lab book. Select “Report.” Select the ions you think are present in the unknown, click “Submit.” If the ion button is green, you correctly determined whether the ion was present or not. If the ion button is red you did not make the correct analysis.
Screenshot When you have correctly identified all ions in your unknown soution, take a screenshot of your lab notebook.
Additional Inorganic Tools
Screencast Screencast yourself using the three additipnal tools in the rubric items below.
Smell Fill a test tube with NH3. Click and hold the nose on the lab bench. Use the chart on the wall for comparison.
pH Paper Fill test tubes with different solutions. Click and hold the pH paper and tube. Use the chart on the wall for comparison.
Flame Test Fill three test tubes with Mg, K, and Pb. Perform a flame test on each by clicking on the Bunson burner on the lab bench.
Calorimetry Lab
Retrieve Supplies Click on the Stockroom. Find LiF on the Salts shelf. You can use the blue arrows to view more options. Select LiF. Also select the coffee cup calorimeter. Return to Lab.
Prepare Experiment Place the coffee cup next to the stand and place the salt near the balance. Zoom in to the balance. Place a weigh paper on the balance. Open the salt. Holding the microspatula, drag down on the salt to fill the spatula, then place the sample on the weigh paper. Measure out a total of three microspatulas of salt in the same way. Remove the weigh paper with the salt from the balance and place it next to balance. Zoom out back to the lab bench. Fill the 100 mL graduated cylinder with water from the sink. Pour the water into the coffee cup. Turn on the Stir function using the green button.
Gather Data Click on Graph, then click on the Thermometer. Click Save on both (which begins recording data). Pour three scoops of ice into the coffee cup, then click Accelerate on the wall to speed up time in the lab. Wait for the temperature to stabilize at 0C for a few minutes. Pour the previously prepared salt into the coffee cup. Let the temperature continue to decrease for a while.
Analyze Data Click stop on both the thermometer and the graph. Open the lab book and click on Calorimetry Data. Copy the data, paste it into a spreadsheet (Excel) and produce a simple graph.
Titrations Lab
Retrieve Supplies Click on the stockroom. Select NaOH and HCl from the Bases, and Acids shelves, respectively.
Prepare Experiment Fill the buret with NaOH by holding the bottle over the top of the buret. Fill the 10mL graduated cyliner with HCl. Get a beaker from the drawer in the lab bench. Pour the HCl into the beaker. Place the beaker on the stir plate and turn it on. Click on the Phen bottle on the lab bench and add a dropper of indicator to the beaker. Pick up the pH meter from the rack and place it in the beaker. Turn the pH meter on. Click on the buret to open Buret View. Click Save to record data.
Perform the Experiment Click on the stopcock to open buret flow. It can be clicked several times to adjust flow. The NaOH can be added quickly until about 7mL, then adjust it to dropwise. The indicator will turn pink when the experiement is complete.
Screenshots Take a screenshot of the lab bench when the neutralization is complete. Open the lab book and open the experiment data. Take a screenshot of your lab book.
Gases Lab
Retrieve Supplies Enter the stockroom. Choose the leftmost hanging control to lift the balloon equipment. Return to Lab.
Controls Zoom In on the balloon pressure chamber. You can control the pressure and temperature by clicking and dragging the levers to the left of the gauges up or down. The green arrow will zoom out to the lab bench.
Practice Trial The gas tanks will be used to fill the balloon inside the chamber. The red and blue arrows control the pressure of the gas emitted from the tank. Choose the tank of He gas. Set the pressure, then click Open Valve. Fill the balloon with about .1 mol of gas. Moles are shown on the bottom gauge on the pressure chamber. Click Close Valve when finished. Should you make a mistake, click the red Reset button on the top right corner of the pressure chamber. Zoom In to the pressure chamber. Adjusting the temperature and pressure inside the chamber will change the volume of the balloon. Practice lowering the pressure and raising the temperature until the balloon bursts. You may reset the chamber and refill the balloon.
Experiment Find a pressure, temperature, and gas combination that will explode the balloon at 2kP. Use approximately .1 mol of gas each time. You may use any gas. Select different gases by clicking Return Tank.
Screenshot Take a screenshot of the exploded balloon at 2kP.
Quantum Lab
Atomic Emission Spectra
Open a Preset Lab From the main Virtual Chemistry laboratory, select Atomic Theory, then Atomic Emission Spectra from the list of assignments. The lab will open in the Quantum laboratory. The Spectrometer is on the right of the lab table. The emission spectra is in the detector window in the upper right corner. The current sample is H2 gas.
Spectrometer Settings Click on the Visible/Full switch to view only the visible spectrum.
Record Data Click the Record button to save the spectrum and graph to your lab notebook.
Change Sample To change gas samples, turn off the Spectrometer using the On/Off switch. Click and drag the electric field away from the sample. A white spotlight will appear where you can place the electric field – place it there. Click and drag the sample to the stockroom shelf. Click on the stockroom. Select Samples. Choose He. When you hoover over the sample on the couter, it should be He. Return to the lab bench.
Record Data Reassemble the experiment and turn on the Spectrometer. Record the spectrum for the visible range of He.
Volt Meter Using the circular buttons above and below each digit on the volt meter, find the voltage at which there is no visible spectrum for He.
Record Data Record the blank spectrum in your lab notebook.
Edit Lab Book Data Open your lab notebook and change the names of the appropriate spectra to H2 and He.
Delete Lab Book Data Delete the blank spectrum.
Screenshot Take a screenshot in which you can see your open lab notebook with the He spectrum visible, as well as your lab bench in the background, with the volt meter set for the blank spectrum.
Milikan Oil Drop Experiment*
Retrieve Supplies From the stockroom, retrieve the Video Camera, Electric Field, Oil Mist, and Electron Gun.
Setup Experiment In order across the lab bench, from left to right, place the Electron Gun, the Oil Mist, then the Video Camera. Place the Electric Field on the Oil Mist. Spotlights will appear and allow you to see where things can be placed. Turn on the Electron Gun. Set the electron gun intensity to 1nA and the volts to 100 eV using the circular buttons above and below each digit. Turn on the Video Camera with the green button on top.
Collect Data (Screencast) Make a screencast showing the following (you may want to practice first): Click Record on the Video Camera viewing window. Click Slow Motion. Choose one oil drop near the top of the frame to measure. Using the timer, time how long it takes for the oil drop to drop one tick mark. Then, using the same oil drop, adjust the Electric Field voltage until the drop stops falling and remains motionless.
Portfolio Create a sub-page under your website portfolio page and label it “Virtual Chem Lab”
Post and Label Content Post the following: screenshots of lab bench and lab book, as well as the screencast from the inorganic lab, the graph from the calorimetry lab, screenshots of lab bench and lab book from the titrations lab, and the screenshot and screencast from the quantum lab. Make sure each screenshot, graphic, and screencast is clearly labeled.
Submit Send a link to this page to your instructor via Canvas. If you are not currently enrolled in a course, send your project to

*Using the falling velocity and voltage required to stop falling, you can determine the charge on an oil drop. Milikan used this experiment to place charges on many oil drops and with that data was able to deduce the charge of one electron. You can reproduce several other historically important experiments in Virtual Chem Lab by selecting them from the hanging clipboard in the stockroom.

Rubric for Logger Pro-Chemistry Planning Badge
Technology You must have previously earned the Logger Pro-Chemistry Technology Badge.
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Rubric for Logger Pro-Chemistry Integration Badge
Technology You must have previously earned the Logger Pro-Chemistry Technology Badge.
Planning You must have previously earned the Logger Pro-Chemistry Planning Badge.
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