Title: Rates of Reaction
Objective: Affect of concentration and temperature on reaction rates
The rate of a chemical reaction is the time required for a given quantity of the reactants to
be changed into the products. Reactions Rate usually is expressed in terms of moles per
unit time. A chemical reaction is the results of effective collisions between particles of
the reactants. In the following lab, the affects of concentration and temperature will be
analyzed.
Equipment: 250 mL beaker (2), Graduated cylinder 10 mL (2), test tubes (2),
thermometer, and timer.
Materials: solution A and solution B
Procedure: Detail account
Part A
Solution B (mL)
10
10
10
10
10
10
Part B
Trial
Ice bath
Cold bath
Hot bath
Solution A (mL)
10
9
8
7
6
5
H2O (mL)
0
1
2
3
4
5
Temperature (OC)
Time (sec)
Time (sec)
Calculations (graph paper)
1. Plot the data from part A on the grid provided. Draw a best fit line for the data
plotted?
2. Plot the data from part B on the grid provided. Draw a best fit line for the data
plotted?
Conclusions and Questions:
1. Based on your data make a general statement about the effect of concentration.
2. Make a similar hypothesis about the effect of temperature on the reactants.
3. What other factors affect the rate of reaction?
4. How does the collision theory relate to the rate of a chemical reaction?
5. Why was only one of the solutions diluted in Part A?
6. Why is it not possible to test pressure as a factor in this experiment?