Views on Stoichiometry

Since our Stoichiometry unit exam was today, I thought I'd just share some thoughts. First, overall this is not a very hard unit, if you study. However. what I seemed to have the most trouble on was finding the theoretical yield. It seemed like no matter what I did, I could not get my answer to match up with any of the selected answers. But that will not happen on the final, hopefully. However, as the last blog post for the semester, I have found some relatively enjoyable videos for everyone. Enjoy!!!

Video 1: https://www.youtube.com/watch?v=UL1jmJaUkaQ

Video 2: https://www.youtube.com/watch?v=jVtP9VSrdGw

Video 3: https://www.youtube.com/watch?v=aUkoPNV_ZXE

Image: https://s-media-cache-ak0.pinimg.com/236x/0e/54/44/0e54449ded9a09c20748e6bc487ed5f6.jpg

Remembering the Driving Forces

Remember, driving forces are different in each type of chemical reaction. In single replacement reactions, the driving force is a precipitate. In an acid-base reaction, it is the formation of water. In a double replacement reaction, the driving force can be either a precipitate, the formation of water, or even a gas. If you are still having trouble, these links can help.

Link 1: http://schools.birdville.k12.tx.us/cms/lib2/TX01000797/Centricity/Domain/912/ChemLessons/Lessons/Acids%20and%20Bases/Driving%20a%20Reaction.htm

Video 1: https://www.youtube.com/watch?v=D4jhofCgNFY

Video 2: https://www.youtube.com/watch?v=AiMwUnuyDDc

Atomic Refresher Part 2

This post is another refresher of atomic structure and radioactivity in preparation for the final. I hope this one, as I do the others, will be most helpful for those studying for the final.

Link 1: http://www.chemguide.co.uk/atoms/properties/gcse.html

Link 2: http://www.chemtutor.com/struct.htm

Video: https://www.youtube.com/watch?v=M5HpZFcT01U

Image: http://www.chem4kids.com/files/art/atom-struct-01.png

Atomic Refresher Part 1

This and the next post are refreshers on atomic structure and radioactivity. These links should prove to be most helpful in preparing for the final exam.

Link 1: http://www.passmyexams.co.uk/GCSE/physics/what-is-radioactivity-and-structure-of-atom.html

Link 2: http://science.howstuffworks.com/nuclear-bomb1.htm

Link 3: https://www.aip.org/history/curie/unstable.htm

Image: http://www.nuceng.ca/igna/images/Alphae.gif

Awesome Reactions Part 2

In Day 2 of our Stoichiometry Lab, we removed both the nail and the water from our baby food jar. We then added HCl to the jar to clean off the copper(II) chloride, and then proceeded to dump out the acid. We then added water again to clean out the rest of the acid and dumped it. Then we took the nail's balance.

Awesome reaction Part 1

In Day 1 of our Stoichiometry lab, we added copper(II) chloride to water in a baby food jar. We then added an iron nail. The resulting reaction caused the copper(II) chloride to dissolve and turn the water blue. Exciting!

Troublesome Test

Today was our Stochiometry weekly quiz #1. I have the formulas down, but for some reason my answers didn't turn out right all the time. Did anyone else have that problem or is it just me? Just in case, if anyone might need these, here are some helpful websites regarding Stoichiometry.

Link 1: https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/e/ideal_stoichiometry

Link 2: http://www2.gsu.edu/~mstjrh/stoichiometry.html

Link 3: http://hinkhousescience.weebly.com/big-idea-5---stoichiometry.html

Image: http://www.quickmeme.com/img/36/362a26c5a0b864457d344ef574734c1ba20f3c875cc7d2a481053957930caac8.jpg

Volatile Reactions

Today we had our Reactive Metals Lab. It was neat seeing the reactions that took place. I noticed that Calcium is highly active whereas copper tends to be inactive when combined with different chemicals.