Computer station

Computer Station

Preparation (should be ready the day before):

0.0 Six to eight volunteering laptops from group members should be provided and they are all set in a classroom in the Maxey elementary school.

0.1 Set up an account for Maxey demo for each laptop.

0.2 Install ChemBioDraw and KaleidaGraph software on each laptop.

0.3 Set up wireless printer/router for each laptop.

Experiment A:

KaleidaGraph is used for processing the Spec20 Data. (Make sure the students finish the Spec20 experiment before they come to this station.)

1. Click the first white box in the toolbar and you can open an empty spreadsheet with three columns.

2. Input the data of concentration and absorbance in column A and B. (Do not input the percentage symbol or the unknown sample absorbance.)

3. Go to “Gallery" from the menu, click “linear” then “scattering”, then there is a window popping up. Choose the A column to be the X-axis, B column to be the y-axis and click “new plot” icon down below.

4. After you have the plot, change the title to be "Absorbance vs. concentration"

5. Go to “file” and click “print graphics”.

Experiment B:

Three molecules will be drawn by using ChemBioDraw: Acetic acid is the main component of vinegar. Acetylsalicylic acid is the active reagent of aspirin. Glucose is the major energy source in our body.

On the left side of the working window, a toolbar contains all the tools that are handy for drawing those molecules, such as single bonds, double bonds, benzene, texting and eraser.

1. Find an empty place and draw the first bond by dragging the icon of a bond from the toolbar to that place and loose your mouse.

2. Move the mouse to the end of that bond where you want to start another bond or a word (for example, "H" is for proton or hydrogen. "C" is for carbon and "O" is for oxygen).

3. After drawing the molecule, use the “lasso” from the toolbar to select the whole molecule, and then go to the menu and select “convert structure to name”. You could find out if you do the right thing by comparing the name that the computer tells you with the name you are supposed to draw.