Sept. 29 Lab 2C

Lab 2C was carried out and it was interesting and fun to do.
All students were asked to create flow charts of the lab beforehand to demonstrate understanding of the the procedure.

Equipment:

Safety goggles
4 Small Test Tubes
Test Tube Rack
Glass Square
2 Eye Droppers
Paper to record observations

Procedure:

Students were given four unknown substances by Mrs. Chen and were instructed to combine the different substances and record observations. Of the four substances, one was a dark greenish colour and the other three were colourless and clear.
There were a total of six possible combinations and therefore 6 observations were made. Students were directed to place one drop of the unknown solution into the given "slot" and then add a drop of another solution to see the reaction take place. This lab was focusing on studying the differences between chemical and physical changes and to see these changes occurring.

Result:

After doing the experiment, one solution remained greenish as the colourless substance did not seem to have any effect on it. Two other solutions remained clear and colourless while the other two solutions turned blue and yellow. Although a vigorous reaction did not take place, the change in colour was fascinating to see and was a good example of the purpose of the lab, which was to observe changes.