Sg Chemistry Blog of week 10/19

Sg Chem 2 reflection paper

Obi Ilozor 3rd hour

In this week in Sg chemistry class, we learned a lot about unit 6. I think that the concept of chapter 6 is conductivity and it has been confirmed all throughout the week. I think another big concept is electrical charge and that was proven when we took two days to carry out and white board a "tape" lab. In this tape lab, we stuck different objects to tape and other objects and ripped them apart. Then we saw if they attracted or repelled. We also did a lab where we put an electrical device to different substances and observed whether they conducted electricity. We could tell whether they conducted electricity or not by seeing if the light  on the device lit up. Overall, it was a pretty long week of new concepts that were hard to grasp at first, but as time went on, they became easier and easier to understand.

Our first lab was a tape lab when and we conducted it while our supervisor was gone. Fortunately, there were no problems. Since there are no current pictures of this lab, here is a picture of what is happening in the tape lab. There was a demonstration in our class as well about how balloons collect negative charges from objects and stick to other objects. The same thing happened in the tape lab. The concept learned from this lab is that electrons can transfer from object to object. That is how objects become charged.

These pictures below depict one of our most recent labs where we commuted to another supervisors lab and conducted an experiment. We put an electrical detective device to different solutions that lit up when it was touched. We found that metal solutions conducted electricity even if it was dissolved in a solution. Just like this molten metal shown below, even though it wasn't a conventional hard metal, it still conducted electricity. Solutions like liquid sulfur and hard sulfur and this solution that I have yet to identify, did not conduct electricity because the light on the device did not light up. Overall, this was my favorite lab but the solution names, that may pop up on the test, are the most confusing part.

The last lab that we actually conducted today was very peculiar. We hooked up a U-tube with graphite rods and electricity in a blue solution mixed with water and some metal alloy. We didn't finish the lab but results were evident. The graphite rod started transforming into something like rust, and its was reddish brown. We will observe the rest of the results on Monday but here is a picture of the lab with my colleague in it as well.

Overall, I believe this week was a really good and long introduction to chapter 6.