CHEM 1030L — Experimental Design 1
Student Name:
Lab Partner(s):
Grade:
______________
______________
Laboratory Report
Date:
______________
Section:
______________
______________ (For Instructor use)
PURPOSE
Instructions: Using 2-4 complete sentences written in third person with proper grammar and punctuation, briefly summarize the purpose of
this laboratory exercise. Include the learning objectives and the major outcomes.
Write the purpose of Day 1 activities here…
DATA AND OBSERVATIONS
Hint: ALWAYS include units of measurement and the correct number of sig. figs.
Test
Tube
#
Mass of
Kudzu
Powder
Heat
or
No Heat
Chemical
Reagent
1
Heat
Water
2
No Heat
Water
3
Heat
HCl
4
No Heat
HCl
5
Heat
H2SO4
6
No Heat
H2SO4
7
Heat
KOH
8
No Heat
KOH
Observations
CHEM 1030L — Temperature Measurements
Laboratory Report
QUESTIONS AND ANALYSIS
INSTRUCTIONS: Using one or more complete sentences written in third person with proper grammar and punctuation, briefly respond to the
following questions.
Hint: Remember that points are awarded for each aspect of the question.
Pre-lab Question 1
How do you think cellulose is broken down in nature? (Think of the steps involved in a tree decaying in the forest.)
Type the response here...
Pre-lab Question 2
List at least three environmental factors that might speed up the process of breaking down cellulose in nature.
Type the response here...
IMPORTANT NOTE
For the following three questions (hypotheses), there is no such thing as a "right" or "wrong" hypothesis. When grading the
following three questions, the instructor will evaluate the thought processes behind each hypothesis. It is important to explain
the logic behind each hypothesis.
Question 3 – State a Hypothesis
Mechanical Pretreatment - The kudzu was ground into a fine powder.
Question: Does the size of the kudzu particles affect how much glucose will be produced? State your hypothesis and
explain the thoughts behind it ("how and why?").
Type the response here...
Question 4 – State a Hypothesis
Heat Pretreatment - Four of the kudzu samples will be heated for 10 minutes in boiling water and then cooled to room
temperature.
Question: Will heating the kudzu affect how completely the plant cell walls will be broken down and, as a result, affect how
much glucose will be produced? State your hypothesis and explain the thoughts behind it ("how and why?").
Type the response here...
Question 5 – State a Hypothesis
Chemical Pretreatment – To investigate whether a chemical pretreatment will increase the breakdown of cell walls, some
kudzu samples will be pretreated with H2SO4, HCl, or KOH. Other kudzu samples will be treated only with water.
Question: Which of the above chemical pretreatments will have the largest impact in breaking down the cell wall, resulting
in the greatest glucose production? State your hypothesis and explain the thoughts behind it ("how and why?").
Type your hypothesis here (Be sure to explain why this is your hypothesis)
Question 6: Of the eight test tubes that were prepared, which ones contain a solution?
Type the response here...
Question 7: What is the solvent in each of the test tubes?
Type the response here...
CHEM 1030L — Temperature Measurements
Laboratory Report
Question 8: In which test tubes will the kudzu dissolve? Why or why not?
Type the response here...
Question 9: What is the definition of a solution? Does a solution always involve or require a chemical reaction?
Type the response here...
Question 10: What important features about aqueous solutions provide for chemical reactivity?
Type the response here...
Question 11: The human body is 70% water and many of the substances found in the body are present in aqueous
solution. How are the factors described in the above question important in allowing the human body to metabolize glucose
into carbon dioxide, water, and energy?
Type the response here...
CONCLUSION
INSTRUCTIONS: Write an essay, using complete sentences written in third person with grammar and punctuation, to briefly summarize (1)
the purpose of this laboratory exercise, (2) the work performed, (3) any problems encountered and how they could affect the results, and (4)
the deliverables.
Use paragraphs to separate major ideas, however, do not number the paragraphs.
Type the response here...