University of Wisconsin - CHEM 104Titrations Online_Sp21

Titration to Determine an Unknown Compound Developed by Stephen Block, Lea Gustin, Aaron Smith, Chad C Wilkinson, and Teri Larson. Copyright © 2021 University of Wisconsin – Madison. Academic Goals • To learn how to choose an appropriate indicator. • To use titration data to determine the formula weight of a compound. Background In this lab, you will become very familiar with what is known as a titration, one of the most accurate of all analytical procedures. In a titration, titrant (a standardized reagent) is delivered via a buret or another device designed to measure volume. The titrant reacts with the analyte in solution at a known stoichiometry. The amount of titrant is typically varied until a chemical equivalence point is reached. This is typically monitored via a change in color or a sharp change on a pH meter. The number of moles of titrant can then be related to the number of moles analyte present via a stoichiometric ratio.