Rate Of Reactions Lesson Plan for 12th Grade Example Students

Topic: Rate of reactions

Objectives & Outcomes

• Define rate of reaction and understand its significance
• Identify and explain the effect of kinetic factors on the rate of a reaction

Materials

• Cations and anions
• Buffer solution
• Buffer solution pH indicator strips
• Two solutions of different concentration of A and B (e.g. solution A: 0.1 M B, solution B: 0.2 M B)
• Independent variable: change in concentration of A and B
• Dependent variable: change in pH of buffer solution
• pH meter
• Stopwatch
• Calculator
• Data table
• Graph paper

Warm-up

• Ask students what they know about the rate of a chemical reaction. Allow a few volunteers to share their ideas.
• Explain that the rate of a chemical reaction refers to how fast the reaction occurs.

Direct Instruction

• Write the following equation on the board:
• As an example, consider the reaction between hydrogen and oxygen to form water:
• The rate of this reaction depends on several factors, including the concentrations of the reactants and the temperature.
• Introduce the concept of the rate law and explain that it gives the rate of a reaction as a function of the concentrations of the reactants.
• Using the example above, write the rate law for the reaction on the board:

Guided Practice

• Have students work in pairs to solve problems involving the rate law for a given reaction.
• These problems could include:
• Sketching the concentration vs. time graph for a given reaction
• Determining the rate of the reaction at a given point in time
• Calculating the rate law for the reaction

Independent Practice

• Have students work in groups to investigate the effect of a different kinetic factor on the rate of a given reaction.
• They can do this by conducting an experiment to vary the concentration of a specific reactant and measuring the rate of the reaction.
• Students will then use their data to create a graph showing the rate of the reaction as a function of the concentration of the reactant.
• Students will present their findings to the class, including a graph showing the rate of the reaction as a function of the concentration of the reactant and a written explanation of their results.

Closure

• Review the concept of rate of reaction and the importance of kinetic factors in determining the rate of a reaction.
• Ask students to give examples of reactions that have different rates depending on the concentration of the reactants.

Assessment

• Observe the students during the independent practice to see if they are able to accurately determine the rate of the reaction and explain the reasons for the observed results.
• Collect and review the students' worksheets for understanding of the concept of rate of reaction and the ability to accurately determine the rate of a reaction.
• Administer a quiz at the end of the lesson to assess students' understanding of the concept of rate of reaction and their ability to determine the rate of a reaction based on the given data.