Group 1 6789 group 2 7043 your calculated data 7338

This preview shows page 7 - 9 out of 9 pages.

Group 1: 67.89% Group 2: 70.43% Your calculated data: 73.38% Avg = (68.89 + 70.43+73.38)/3 = 70.57 (70.57-67.89)^2 + (70.57-70.43)^2 + (73.38-70.57)^2 / (3)^2 Standard deviation= 3 Avg +/- SD = 70.57 +/- 3%
Penn State CHEM 111 Question 12: Why not just do a “regular” titration? – i.e., what is the advantage of a back titration in this case?
8
Section F: Acid Concentration in Fruits Pucker Order Please change the hypothesis in your Chemtrek to: There is a hypothesis that the pucker-promoting potential of fruits and fruit juices is directly proportional to the concentration of organic acids present in the fruit. Knowing that the order of sour taste, or pucker power, is Lemon > lime > grapefruit > orange for fruit juices, please use the information in the video to tell us whether you accept or reject the hypothesis. Pre-lab data collection and observations. Complete before lab. Read through this section in your Chemtrek and watch the video associated with this section. In the space below, summarize how the experiment was performed. Include any data and observations from the video in a table. 5 7
Question 9: (a) Report the concentration of acid in each of the fruit juices.
Penn State CHEM 111 31 drops x 0.1 M NaOH = 2 drops x (M of lemon juice) = 0.155 M Lemon Juice (b) Based on the results, do you accept or reject the hypothesis given above? Explain.
9 Your name: Angelina Toral Date Completed: 3/30/21
(c) Are there any changes that you would make to improve this experiment? If so, what are they and how might they help? If you would not make any changes, explain why.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture