Acid/Base Strength

Acid and base strength depend on different things.

Acid strength depends on the list of strong acids and also whether the oxygens outnumber the hydrogens by more than two. The chart below shows the memorized list of strong bases:



Strong bases only depend on one thing: whether they have a group 1 or group 2 metal in them.



Here is a quiz to review: http://chemistry.about.com/od/acidsbase1/l/blacidbases.htm

Conjugate Acids & Bases

Conjugate acids and bases are found by using Bronsted-Lowery. In this method, acids donate a proton (H+) and bases accept a proton. Basically, the acid on the left side of the equation donates a proton to the product, making it the conjugate base. The base on the left side accepts a proton, making its product the conjugate acid.





Above are two ways of showing conjugate acids and bases.

https://www.khanacademy.org/science/chemistry/acids-and-bases-topic/copy-of-acid-base-equilibria/v/conjugate-acids-and-bases

http://chemwiki.ucdavis.edu/Physical_Chemistry/Acids_and_Bases/Acid%2F%2FBase_Reactions/Conjugate_Acids-base_Pairs

Vitamin C Lab

Today, we started the Vitamin C lab. It is essentially testing different common drinks, such as apple juice and V8, for their vitamin C concentration. You add 20 drops of the liquid along with 3 drops of starch, and then you continue to add iodine drops until the solution remains a dark blue color. It was really interesting to see how different drinks that people drink every day have such different concentrations of this citrus-y vitamin even though they're all fruity.





Here is a link that may help with this unit: http://hyperphysics.phy-astr.gsu.edu/hbase/hph.html

Unit Test

Tomorrow, we are taking the unit exam for aqueous solutions. Since I didn't do as well as I wanted to on the quiz, I need to study extra tonight, so I have included good sources that could help with refreshing and studying the below topics.

We have learned about dilutions, types of solution formations, solubility lines, and how to use molarity in stoich calculations.

http://www.chemteam.info/Solutions/Molarity.html

http://www.occc.edu/kmbailey/Chem1115Tutorials/Molarity.htm

https://www.youtube.com/watch?v=SXf9rDnVFao

https://www.youtube.com/watch?v=rPND65LPwS0

http://chemcollective.org/activities/tutorials/stoich/solution_stoi

Molarity

Molarity is one of the basic principles of this unit. The formula is depicted bellow. Another way to think of molarity is by saying the concentration of a solution because it is measured by the amount of moles per every one liter, meaning it is the concentration of it.

http://www.bozemanscience.com/science-videos/2010/12/9/solutions-and-molarity.html

Also, here are a few examples of running molarity problems in all three ways possible:

Murder Lab

We finished up the murder lab today in class by weighing our final product and filter paper. We concluded that the murder weapon was AgNO3, and the molarity was around 0.18M. According to these two facts, and by looking at all of the suspect information, it was found that Mr. Green killed Miss Scarlett.

Below is a picture of our experiment before the solid was fully filtered.

Good to the Last Drop Lab

Our first lab of this unit was simple and to the point. After learning dilutions today, we got to test it out ourself with water and food coloring. Below is the procedure:

We then figured out solution B to be 0.2D and solution C to be 0.02D.