5.2: Kinetics Lab - Integrated Rate Law
- Page ID
- 342651
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Learning Objectives
Goals:
- Mathematically determine the rate of reaction's dependence on concentration and temperature for a specific chemical reaction
By the end of this lab, students should be able to:
- design, and run an experiment to calculate the constants in the rate law for a chemical reaction involving two reacting species..
- generate log-log plots to calculate the orders of reaction for various reactants..
- Use Arrhenius Equation to determine the temperature dependence of a chemical reaction.
Prior knowledge:
Safety
- Emergency Preparedness
- Eye protection is mandatory in this lab, and you should not wear shorts or open toed shoes.
- Minimize Risk
- Check the cord on the hotplate, inform the instructor if it is frayed.
- Make sure the electrical cord never touches the surface of the hotplate
- Recognize Hazards
- All solutions should be considered harmful and care should be taken to avoid contact with your skin or other body tissues.
- In event of contact with reagents you should flush contacted area with water and notify instructor immediately.
Equipment and materials needed
| 6 Burettes | 250 mL Erlenmeyer flask | 100 ml beaker |
| 0.04M Fe | 0.15M HNO3 | 0.04M KI |
| distilled H2O | 0.004M Na2S2O3(aq) | 2% Starch |
| hot plate | Ice bath |
Figure \(\PageIndex{1}\): Experimental setup. See how the thermometer goes through the stirrer. When placing the test tube into the water bath do not have it touch the bottom, but add enough water to the bath so that it goes up to about an 2 inches from the top when the thermometer is inserted. (Copyright; Belford CC-BY)
Background
Kinetics deals with the rate at which a process occurs and chemical kinetics deals with the rates of chemical reactions. This lab will investigate the kinetics associated with the following reaction