Acid/Base Titration Lab
In this lesson, students will learn about acid/base equilibrium. They will titrate an unknown sample of KHP (potassium hydrogen phthalate) with NaOH (sodium hydroxide). They will determine the %KHP in their unknown sample by plotting their data using Excel and finding the equivalence point.
Subject Matter/Grade Level
This lesson will be designed for an AP Chemistry class in high school.
Utah Core Curriculum Standard
Students will understand the properties that describe solutions in terms of concentration, solutes, solvents, and the behavior of acids and bases.
Technologies
Students will use a pH meter to make measurments during their titration. This lesson can be adapted depending on the resources of the school. A software program and a buret with a stepper motor could be used to run the titration, but these resources are infrequently available in schools. Instead, the students can record the data by hand. They will also use Excel to analyze their data.
Teacher Crafted Example
The final product to be turned in for this lesson is a lab report. The lab report will include a description of the work done in the lab, the data that was collected, the analysis on Excel, the calculations, and the final answer for the % KHP in the unknown. The lab report will be written according to 'formal lab' guidelines. This means that students must include an abstract, a background section, a procedure section, a results section, a conclusion, and an error analysis.
Assesment of the Final Product
Students will be graded on their lab report. They will get points for accuracy, and the lab report will be graded according to correctness. There will be a rubric assigning points to each section of the lab report, and describing what students recieve points for.
Tuesday, October 12, 2004
Tuesday, October 05, 2004
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