RIP

So we took the unit test yesterday and I don't think I did well, I forgot the chemical of bicarbonate but I'm pretty sure I was able to guess correctly. I don't know how I did there were a lot of questions and I guessed on like the last 6 because I ran out of time. With the last about 10 I just stared going without any re-guard to sig figs and I was able to get an approximate answer which was close to an answer. There was one question about gas conversion I believe, and I had no clue... I'm praying that I did good.

Hydrates and Formula of a Hydrate

On Friday we learned about Hydrates, a hydrate is a compound that contains water as part of its structure it is crystalline structure. The amount of water in a hydrate can be determined by heating all the water out  we did a lab yesterday about hydrates and getting the water out of a hydrate to determine the mass of the anhydrous salt in the compound. The compound that we removed the water from was CuSO4 * xH2O. The amount of water that we found ended up being 5 so its name was Copper (II) Sulfate Pentahydrate it was this really pretty blue crystal that when we heated turned all gray and ashy and it was actually pretty cool.

(This image was supposed to be vertical but after editing

 it and uploading it 6 times I think it wants to be horizontal...)

Dimensional Analysis

(For some odd reason this post didn't publish, the actual post was made 11/2)

So in class we learned about dimensional analysis. It's not too difficult you just have to know the conversion rates for everything then it's pretty straight forward from there. The wiki page for dimensional analysis give a pretty good summary of what exactly it is. I keep getting tripped up on significant digits and what to round to so I looked at the wiki page for significant figures and it helped quite a bit.

Chemical composition pre-test

So we just took the pre test and I was pretty lost on what exactly was going on, there was a string of about 6 questions where I'm pretty sure I got the right answer on but other than that I'm really not sure. It seems like well actually be dealing with chemicals now which I'm excited for but it still seems like there's a lot of math involved which I'm not thrilled about. On my last unit test I got a 75% which isn't a bad score but it certainly isn't the best score you can get, but I'm just happy to get out of that unit, it was pretty confusing to me. I found this link and it explains exactly what a mole is so I have a bit better idea of what was going on in that test but it seems like a whole new thing again, wish me luck...