Experiment 5 Rates of Chemical Reactions, I: The Iodination of Acetone
Name: ____________________________________________ Date: ___________________
Lab Partner’s Name: _________________________________ Score: _________________
II. Results Analysis
References (APA Style)
DATA AND CALCULATIONS
Table 1 Reaction Rate Determination
Mixture Number Initial Concentrations* Time for reaction (s) Temperature (oC)** Reaction rate (M/s or mole/L ● s)
Acetone (M) Iodine (M) HCl (M)
* Calculate the initial concentrations before coming to the lab.
** Report the average temperature in the Rate Constant, k, calculation section below.
INITIAL CONCENTRATIONS CALCULATIONS (PRE-LAB ASSIGNMENT):
a) Rate Law Expressions for Mixtures I to IV:
Mixture I Rate Law (Rate I):
Mixture II Rate Law (Rate II):
Mixture III Rate Law (Rate III):
Mixture IV Rate Law (Rate IV):
b) Rate Ratios (Show all Calculations below): Reaction Order
p ____ (H+)
c) Overall Order of the Reaction: __________
d) Reaction Rate Law (Rate Equation) for the Iodination of Acetone:
e) Rate Constant, k :
Mixture I II III IV Average
k ____________ ____________ ____________ ___________ ___________ at _____ oC
Show all Rate Constant (k) calculations:
1. What was the role of iodine, acetone, and hydrochloric acid in the iodination reaction?
2. a) How many reactions were performed and which reactant concentrations did you vary in these
b) Why did you vary these concentrations?
3. a) What is the order of reaction with respect to the concentration of each reactant (acetone, hydrochloric acid and iodine)?
b) What happened to the reaction rate when the concentration of acetone was doubled?
4. Using your given data set for mixture 4 and result of your data and calculations section, you were asked to determine the rate of a fifth reaction mixture made up in the following way:
5 mL 4 M acetone + 5 mL 1 M HCl + 15 mL 0.005 M Iodine
How long (in seconds) will it take for the Iodine color to disappear at the same temperature of your Mixture 4?