Chapter 1.
Overview
Experiment 5
An Acid-Base Titration: Determining Molecular Weight
The learning objectives of Experiment 5 are as follows:
- Prepare and standardize a base for use in titration; understand the need for standardizing and the significant figures obtained using the buret and pipet.
- Utilize acid-base titration concepts and laboratory techniques to determine the molecular weight of an unknown acid by titration with a standardized base.
- Be able to describe where accurate solution measurements are needed and how these are used to calculate the molecular weight.
This video will review Experiment 5 so that you are properly prepared when you arrive for lab.
The Department of Chemistry and Biochemistry
The Ohio State University
Intro
When working with solutions in chemistry, often times we need to know the concentration of the ions in solution. For acid-base solutions we can use an acid-base titration to determine this.
A titration is an experimental way to determine the concentration of an ion in solution. In an acid-base titration we utilize the mole ratio of protons to hydroxide ions in the neutralization reaction.
When doing a titration you will use a solution of known concentration, or a standard, to find the concentration of an unknown solution.
Purpose