Chem Club

So after school, I went to go over my test and it happened to be the same day as chem club. They were making snow globes so I made one too! We dissolved benzoic acid in water, and then let it cool. It started to form unique looking "snow". I'm probably going to super glue something in the lid for a Christmas theme, so it's not an empty snow globe. It was pretty cool lab.

Test

We had our unit test today. I was running on one hour of sleep and a lot of caffeine. When I got to class, I felt pretty awake but I was jittery when I was taking the test. I was hearing a lot of people didn't get done on time so I tried not to spend too much time on problems I couldn't figure out. I did a lot of practice and was pretty confident I wouldn't fail, but now I'm not too sure! When we took notes on molecular and empirical formulas, I was a little confused. I watched some videos about how to solve some problems and it made a lot more sense. Overall, I feel like this sad piece of toast. 

How to find empirical formula

Hydrate

Anhydrous

chloride lab

In this experiment, we tried to find the compound of zinc chloride by measuring masses with the hydrochloric acid. It was cool to see the zinc dissolve and the chloride evaporate.

here's a selfie of me and frank that she doesn't know about

Lab

We had a lab the other day, and we were working with copper sulfide. When you heat this chemical, it changes from blue to white, eliminating the water in it. The masses change when heated. It wasn't the most exciting lab but I'm glad I got the opportunity to do it.

Quiz

The quiz we took the other day was not easy. It required a lot of math, and I got confused about how to set up some of the problems. Hopefully the test on Monday will be better than the quiz, but I got a lot of studying ahead of me.


here's a link to help with calculating formulas of hydrates
https://www.youtube.com/watch?v=KCuYQ3ayFNM