Last modified: Sun 01/17/2016 03:38:07 pm
BCE

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

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1. List four factors (no particular order) that effect the rate/speed of a chemical reaction (what can increase or decrease the speed of a reaction?)

Factor #1

Factor #2

Factor #3

Factor #4

2. In the plot below the concentration of a reactant for a reaction has been followed over time. There are three straight lines drawn (two tangent and one not tangent) on the curve. Label the line that represents the initial rate, an instantaneous rate and an average rate.

initial rate straight line is line

instantaneous rate straight line is

line average rate straight line is line

3. The slope of a straight line can be determined by dividing the difference in the y-values of two points on the line by the difference in the x-values of the same two points on the line. Look at the Figure on page 3 of the DCI Workbook (shown here)

and determine the slope of the line (the initial rate) that passes through 0.35 M on the y-axis. (NOTE: I recommend choosing two points on the straight line, counting the number of squares for the y-axis distance and the x-axis distance and then dividing the values.)

slope of the line M minute -1

4. Look at the Figure on page 4 of the DCI Workbook (shown here)

and determine the slope of the line (the initial rate) that passes through 1.05 M on the y-axis. (NOTE: I recommend choosing two points on the straight line, counting the number of squares for the y-axis distance and the x-axis distance and then dividing the values.)

slope of the line M minute -1

5. By what factor did the initial concentrations change for Experiments #1 (Table on page 3) and #2 (Table on page 3)? (Take a ratio of [NO2]o (Exp #2)/[NO2]o (Exp #1).)

6. By what factor did the initial rates change for Experiments #1 (Q 3) and #2 (Q 4)? (Take a ratio of intial rate of (Exp #2)/intial rate of (Exp #1).)

 

7. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

8. If there is one question you would like to have answered in lecture, what would that question be?