Links for Test Prep

Acid Base Theories- Differences and Descriptions of Arrhenius and Bronstead-Lowery definitions

Acid and Base Strength- Video of how to determine the strength of acids and bases

Ion Concentration- How to determine the concentration of hydroxide and hydronium ions in order to determine pH and pOH

Determining and Calculating pH- How to determine pH in strong and weak acids and bases

Titration Example- How to determine molarity of an unknown acid using a titration

Limiting Reagent Titration- Video of how to determine pH when there is a limiting reagent that needs to be accounted for

Molar Mass of An Unknown Acid Lab

This lab was very fun! I didn't do the last titration lab, so this was my first experience doing a titration by myself. In order to complete this lab, we completed a titration of an unknown substance to find its molar mass. To start, we measured the amount of the acid and dissolved it in 100 mL of water. In order to get it to dissolve, we had to heat the solution on a hot plate, as well as add a stir bar to better mix the substance. Once the solution was completely dissolved, we titrated the substance with NaOH until the substance turned pink. Next, using our data, we did the math to find the molar mass of the substance, which between the two trials averaged about 177 g, which was only about a 1% error. I'm very happy with the results of the lab, because it helped a lot with my understanding of the material and we got a good grade.

Percent Acetic Acid in Vinegar Lab

This lab was very interesting to me. Although I didn't participate because I was absent on the first day of the lab, watching the other students do the lab was really cool. The difference between the pink colors that students got was really cool, and it also helped my understanding of titrations a lot better. For the lab, we had to titrate Vinegar and KHP to find the molarity of each substance. In order to get the most accurate results, much care was involved in adding the base to the substances, as we wanted to get the exact molarity of each substance. Overall, the visual of titrations makes a lot more sense to me now.

https://www.dartmouth.edu/~chemlab/techniques/titration.html

Acids and Bases Quiz

The Acids and Bases quiz on Monday went very well. I knew exactly how to do every problem, and it was pretty easy for me. The quiz was ranked as a 4-5 on the difficulty scale, which was one of the hardest tests or quizzes that we have taken all year. I studied for a very long time for this quiz which definitely proved beneficial to me. Although there were a few problems that were slightly confusing, I still feel I did them right. I'm hoping for a really good grade on this quiz!!!

http://blog.getemoji.com/post/125439695505/what-does-the-number-next-to-the-fire-emoji-on

pH Lecture

The pH lecture was incredibly confusing. At first, it didn't seem like it would be bad, but I was wrong. The longer that class went on, the more confused I got. By the end of class I was so confused I could barely tell my right from left. The quiz is on Monday, and this lecture was on Friday so I'm really going to have to study for the quiz. Many hours will be spent practicing and working problems to ensure I know exactly what I'm doing for the quiz. I'm very nervous, but hopefully my practice will enable me to do good.

http://feedyoursoul.com/2014/08/06/the-gift-of-confusion/

Vitamin C Lab

The Vitamin C lab was a fun one to do. We tested 4 kinds of juice, and the purpose was to find which juice had the greatest amount of vitamin C in it. In order to determine this, we put 20 drops of each juice in a test tube, then added starch as an indicator. Then, We added an Iodine solution that we continued to add until the juice turned a dark blue color, which was the endpoint of the reaction. We tested grapefruit juice, apple juice, V8 and pear nectar, and the grapefruit juice had the greatest amount of Vitamin C. This lab connected to what we're doing in class because it served as an intro to acids and bases by having us practice how to determine endpoint and visually see the titration reactions.

http://www.dailymail.co.uk/health/article-2785621/How-grapefruit-really-help-lose-weight-Drinking-fruit-s-juice-eating-fatty-food-help-reduce-weight-fifth.html