Unit Test

    Today we took our unit test over stoichiometry. It was only 12 questions which is good, but also kind of scary because it is easier to fail. I feel like I knew what I was doing throughout the test and that I did not get any answers that were completely unreasonable. Hopefully grades go in school. On the bright side, we are now officially done with our last unit of the semester.

Helpful Links!

Below are some links that will hopefully make this unit a little easier. Especially since our unit test is tomorrow.

Magic Number Stoichiometry

Practice Quiz

Dimensional Analysis Review

Balancing Equations Review

Bozeman Science Stoichiometry

Bozeman Science Limiting Reactants and Percent Yield

Copper (II) Chloride and Iron Lab

Over the past several days, we have completed a lab involving copper (II) chloride and iron. We placed an aqueous solution of copper (II) chloride in a baby food jar with an iron nail. In the end, we created iron (III) chloride. Below are pictures as the lab progressed and as we drained our jar of everything but our copper formed.

Day One 

Day Two

Day Three

Weekly Quiz

Today we had our weekly quiz over our new unit, stoichiometry. From the two class lectures we had, the unit did not seem that difficult. I followed along with the examples that were worked in class and did extra practice. I felt confident with all of the material and while I was working out the problems on the quiz, I maintained that confidence. I did all of my calculations and thought my answer looked right. Then, I looked at the answer choices. None of them were the answer I had gotten with my calculations. This did not happen with just problem, but seven of them. I carefully retyped in my calculations into my calculator hoping to catch my mistakes, but I came out with the same answers. I redid all of my numbers in the calculations and still had no luck in figuring out my mistakes. Hoping for the best.

Solubility Rules

Below is a chart to help you determine the solubility of certain compounds. These rules only apply for double replacement/ precipitate reactions. Below the chart are some helpful links.


Practice Quiz
Mnemonic Tricks Video
Solubility Rules Explanation Video

Unit test

     Today we took our test for our chemical reactions unit. I feel like I did not do too badly on this test. I am certain that this unit test went better than the last unit test (chemical composition). This time around I feel like I knew more material on the test and had plenty of time to finish it. I only felt unsure about a handful of questions, but felt comfortable with the material overall. I tried to read every question carefully, but I still feel like I may have forgotten a small deatail and messed up a lot of questions. Hopefully that feeling does not turn out to be true.

Activity Series of Metals Lab

In this lab, we combined 4 metals (Pb, Cu, Ca, Mg, Sn, and Zn) with 4 different solutions (H20, HCl, CuSO4, and AgNO3) to observe the reactions taking place. Below are a few pictures of our products of the reactions.

What is an Activity Series?