Sg Chem 2 reflection of week 9/14/15

Sg Chem 2 reflection paper

Obi Ilozor 3rd hour

This week in Sg Chem 2, we did a fair amount of activities, most of which were review. We reviewed terms and concepts from Sg Chem 1 and did a fair amount of white boarding on them. We did a white board on the properties of matter.We also looked at the differences between water and ethanol in several different ways. We put both substances in an electrolosis device and we also put sugar cubes into each substance to see how they would dissolve. Another thing we did was learn about the differences between molecules, particles, atoms and more. Finally, we read about primitive theories that eventually transformed into theory that we stand by today. That everything is composed of atoms. Overall, this week was more of a review and an introduction if anything. I know that more interesting weeks will soon come.

One white board activity that we did was identifying properties of matter. It was a short activity where we all shared what some properties were and in the picture below, it shows what the class came up with.

The electrolosis activity that we did to compare ethanol and water was one of the more interesting labs that we have done so far. An electrical current was put through a copper wire and did something to both substances. I think it heated it up so that the particles of H2O would split. I don't know how it was done, but somehow, hydrogen gas was collected in a tube. A lit match was put into the hydrogen gas and it made a loud sound. In a way, the sound was like a pop. When the ethanol was heated up, it produced oxygen gas and that was also collected in a tube. This time when a flame was put into the tube, it burned brighter for a quick moment. That was the end of the lab. This is what the electrolysis device looked like.

We had a mastery assessment on elements, compounds, mixtures, atoms, and molecules. We learned about this for two days and this is the white board that my table came up with. There was not much to this activity except for the informational part. 

This week, we also read about how the theory of atoms was created. There are no pictures because it was just a reading that we did on Friday.

Another lab we composed this week was the sugar solubility lab. We placed sugar cubes in water and in ethanol and observed. The sugar dissolved in water but not at all in ethanol. In a 50/50 mix of the two, sugar dissolved. It was a fun lab.

All of this occurred this week. Even though it was an introduction to chem 2, it was still filled with all of this information.