WebLecture: Measuring and Quantifying Reaction Rates
Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 14: Sections 1-2.
- 14.1 The rate of a reaction can be measured by the change in concentration of the reactants or products as time passes. By convention, concentration is represented with brackets: [NO2] means concentration of nitrogen dioxide, so the formula takes the form rate = Δ[substance]/Δt. The reaction rate itself will change over time, usually decelerating with decreasing reactant concentration. The rate of disappearance of reactants will be balanced by the rate of appearance of products, in the ratio of moles specificied by the stoichiometric coefficients of the balanced reaction equation.
- 14.2 Reaction rates can be affected by several factors, including concentration, temperature, and the presence of catalysts that can lower the activation energy level required for a reaction to occur.
Videos for Chapter 14: The Rates of Chemical Reactions
Review the Videos at Thinkwell Video Lessons.
- Under "Chemical Kinetics"
- Reaction Rates
- An Introduction to Reaction Rates
- Rate Laws: How the Reaction Rate Depends on Concentration
- Determining the Form of a Rate Law
Homework problems: See your Moodle assignment!
AP #10 GUIDED INQUIRY — Determination of solution concentration of copper sulfate solutions using visual colorimetry. — Phase III
Use your set of calibrated solutions to estimate the molarity of a sample of unknown concentration. Submit a formal report of your work for this laboratory experience.
- APGIE Lab 1: What is the Relationship Between the Concentration of a Solution and the Amount of Transmitted Light Through the Solution
- IGHCE Lab 7.5 Determine the Concentration of a Copper Sulfate Pentahydrate Solution through Visual Colorimetry
- HSCMK XIII-1: Determine Boron Concentration with Curcumin using Visual Colorimetry
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