Jessie Asked: Will doing this work? or will it mess up my weightloss? ?

For modeling I can only eat 500 calories a day.. but would it mess up my weightloss if I ate junk food ?
( meaning, if I ate 500 cals. For a couple days could I eat what I wanted for a day. Than repeat)

Will I not lose weight like I should than?

Susan Asked: In YOUR OWN WORDS, what is a titration? What type of reaction is it?

(a) (1 pts.) In YOUR OWN WORDS, what is a titration? What type of reaction is it?

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(b) (1 pts.) What is the BALANCED chemical reaction for the titration performed in this lab demonstration? What does this balanced equation tell us that is so important with respect to this particular lab exercise, and how do you use this information in this lab?

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(c) (1 pts.) What is the name of the special piece of glassware used in this titration exercise? Why use it as opposed to, say, a graduated pipette–what is special about the glassware used here? How is it SPECIFICALLY used in this lab?

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(d) (2 pts.) In a titration, assuming it is carried out just like the one in this lab exercise, how do you determine the number of moles of base used? Explain in detail, showing all work.

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(e) (2 pts.) In a titration, assuming it is carried out just like the one in this lab exercise, how do you determine the number of moles of acid used? How do you then use this information to determine the concentration of the acid? Explain in detail, showing all work.

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(f) (1 pts.) In this titration example, how do you know when the reaction is complete? What is used (be specific), and how does it work? What is the official name (Dr. Yee mentions this) of the end of this reaction?

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(g) (2 pts.) How does the hydrogen ion (H+) [or the hydronium ion (H3O+)] and the hydroxide ion (OH-) fit into all of this? What is their role in this reaction? In the case of this particular example that you watched, where would each of these ions have come from?

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(h) (2 pts.) Suppose I wanted to calculate the pH of the acid used in this titration. How (explain) can I use the results from this experiment to do this? What would the pH be in this case? Show all work.

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(i) (2 pts.) Throughout the video there were various suggestions that came up that were useful tips for you to remember that would help make sure your titration was a successful one. Dr. Yee mentions a few, but there were also some that came up within the images on the screen. What were at least 2 tips for carrying out a successful titration?

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(j) (1 pts.) In the second video listed above, red cabbage was demonstrated as a natural indicator, and the hydrangea flower was also mentioned. Do some research (include references) and find and discuss another natural acid/base indicator that was not mentioned in the video.

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(k) Suppose your instructor handed you a bottle of sulfuric acid of unknown concentration. The chemistry department was considering using it for a summer program for elementary students to test rock samples to see if they contain limestone. However, they dont want to give it to the kids if it is too strong, and noone in the department was willing to drop some on their skin, and all the graduate students and TAs were already guinea pigs in other experiments, and the department did not want to compromise the data from that research in any way. So, the task falls to you, the eager undergraduate student.
[i] (2 pts.) First, explain, using a chemical equation, and then describing it, how sulfuric acid could test for the presence of limestone. What specific reaction would be taking place, and what easily noticeable phenomenon would you be looking for when doing this test? Why?

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[ii] (3 pts.) Suppose you take a 25.00 mL sample of this sulfuric acid solution. You then titrate it with a 0.1322 M potassium hydroxide solution. A volume of 41.22 mL of potassium hydroxide was required to complete the titration. What is the concentration of this unknown sulfuric acid solution?

Answer: