Vitamin C Lab

Today we started a lab in class using different juices to determine the vitamin C content in the beverages. We tested pear, apple, v8, a standard, and others to determine this. My partner and I still have other tests to finish up. Then we will determine which of the beverages have the highest amount of vitamin c.

Unit Exam

After that first quiz results, I was worried about chemistry this quarter. However, I prepared for this test in excess and the snow day helped with the preparation. I was able to do a lot more practice problems and it helped me prepare for this test. I feel confident about it and hope I can get more tests where I am this confident about it.

Stoichiometry review

Stoichiometry is the a section of chemistry that involves using relationships between reactants and/or products in a chemical reaction to determine desired quantitative data. We use one set of data to transfer information and find out how much is used of the other substance. This is important to know since this chapter uses it in some molarity problems.

Weekly quiz

We took a quiz at the beginning of the week and I thought it was pretty easy. But my scores did not represent that. I didn't do as well as I thought I would. It was over Molarity and I didn't get it all that well. I Understood the saturation graphs but the math and some of the other type of problems troubled me. I will study these topics more and get a better grade on the unit test. Here are some links to help with this chapter.
http://www.chemteam.info/Solutions/Molarity.html
http://www.chemteam.info/Solutions/Molarity-probs1-10.html
http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Reactions_in_Aqueous_Solutions/Unique_Features_of_Aqueous_Solutions
http://www.gcsescience.com/m28.htm
http://www.sciencegeek.net/Chemistry/taters/Unit6SolutionConcentration.htm
http://www.chemteam.info/Solutions/Dilution.html

Nail Lab Day 1 and 2

We did a lab using a nail and a chlorine solution. We place the nail inside the solution and let it sit there for 2 to 3 days. Afterwards we can see the chemical reaction taking place. Within 5-10 minutes you can see the  rust begin to form. It was a really cool lab.

The next day we isolated the copper from the solution and the nail. The reaction with the iron nail left the copper remaining in the jar with the solution. We rinsed the solution out with hydrochloric acid and distilled water. This helped isolate the copper. The nail seemed to look like it had parts of it melted off. It was really cool.

Percent Yield

This was our last day of notes this semester in chemistry. It was probably the easiest lesson we will have all year. Percent yield is basically finding out the percentage of the product that was actually formed. We use the actual yield from a lab and divide it by the theoretical yield of the product and multiply it by 100. It is a fairly easy concept.
https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/a/limiting-reagents-and-percent-yield

Limiting Reagents

This topic is just adding on to the knowledge of what we learned the other day. We compare the yields that we get of the product from the two reactants. The reactant that produces the least amount of product is the limiting reagent. It limits the amount of product that the reaction can produce.
These are some helpful links that I have found.
https://www.chem.tamu.edu/class/majors/tutorialnotefiles/limiting.htm
https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/v/stoichiometry-limiting-reagent