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8 Questions on Survey of Chemistry - Assignment 1 | CHEM 1151L, Assignments of Chemistry

Material Type: Assignment; Class: Survey of Chemistry Lab I; Subject: Chemistry; University: Clayton State University; Term: Unknown 1989;

Typology: Assignments

Pre 2010

Uploaded on 08/04/2009

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REPORT SHEET I
Date Name
Biochemistry Survey Partner
Answer the following questions:
1. Why did sucrose give a positive test with Benedict's solution after heating?
2. A. Imagine that we heated the starch with H2SO4 for about 2 hours, similar to what
we did with sucrose. What would you expect for the results of a test with I 2 on
this heated starch solution? Why?
B. What would you expect as a result if Benedict's solution was added to the heated
starch described above? Why?
3. What is the mass percentage of fat found in potato chips? Show your work.
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REPORT SHEET I

Date Name Biochemistry Survey Partner Answer the following questions:

  1. Why did sucrose give a positive test with Benedict's solution after heating?
  2. A. Imagine that we heated the starch with H 2 SO 4 for about 2 hours, similar to what we did with sucrose. What would you expect for the results of a test with I 2 on this heated starch solution? Why? B. What would you expect as a result if Benedict's solution was added to the heated starch described above? Why?
  3. What is the mass percentage of fat found in potato chips? Show your work.

REPORT SHEET II

Date Name Biochemistry Survey Partner

  1. What is the mass percentage of protein found in milk? Show your work.
  2. In light of your answer to #4 above, what is the major component of milk?
  3. In part C of the protein tests, we treat egg albumin in a variety of ways. In general, what are we doing to the protein in each of these steps. (I’m looking for one word.)
  4. Explain briefly, with a chemical reaction if possible, what is happening in the enzyme reaction we observed. Just for Fun: A. Was there starch in the food item tested? How do you know? B. Were the Fat Free snacks really fat free? How do you know? C. Did the milk contain fat? How do you know? Did this result seem correct?