Preparation and Testing of Buffers

Contributors

Beyond Benign

Beyond Benign, Inc.

Dean Campbell

Professor | Bradley University

Summary

The purpose of this lab is to give students experience in the practical preparation of buffers and exploring buffer properties. Students will prepare aqueous solutions with specific concentrations of acids and bases, and use pH meters to examine the pH of these buffers. The buffer capacity of the prepared buffers will also be measured.

Featuring contributions from Tamara Fitzjarrald.

Keywords

Acid-Base Chemistry

Buffer

Submitted by

Dean Campbell

Safety Precautions, Hazards, and Risk Assessment

Chemicals and their CAS numbers.
Acetic acid 64-19-7
Sodium acetate 127-09-3
Hydrochloric acid 7647-01-0
Sodium hydroxide 1310-73-2
pH meter calibration buffers ?

Precautions, including proper personal protective equipment such as goggles and gloves, should be used when working with experiments. Always wash your hands after completing the experiments and demonstrations.

Teacher Recommendations or Piloting Data (if available)

We have run this lab for years in our Gen Chem 2 Lab courses.

Evaluation methods are mixed between the quality of written communication of the experimental summaries and plans, and successfully producing the buffer and calculating its buffer capacity. The Green Chemistry/toxicology question also serves as a writing prompt that can be evaluated.

Digital Object Identifier (DOI)

https://doi.org/10.59877/IPMU6605