Exp 2: Volumetric Analysis
Experiment 2 Virtual Lab Tutorial >> Acid Base Titration >> Evaluation Question
Experiment 2 Virtual Lab Tutorial: Acid Base Titration
Summary (from the Lab Manual and the Techniques Tutorial)
Volumetric analysis (VA) is a quantitative analytical process based on measuring volumes. The most common form of VA is the titration, a process whereby a standard solution of known concentration is chemically reacted with a solution of unknown concentration in order to determine the concentration of the unknown. In the first part of this experiment KHP (the standard) is reacted with sodium hydroxide (concentration unknown) until the reaction between the two compounds reaches completion (called the "end-point" of the titration). The endpoint occurs when the first pale pink colour appears in the colourless solution and stays (upon swirling) for 30 - 60 seconds. Once the sodium hydroxide solution has been standardized, it can then be used to standardize a hydrochloric acid solution of unknown concentration.
Measurements in VA must be have at least 4 significant digits. As you perform each step in this experiment, think about whether every instrument you use fulfills this requirement. Make sure that you maintain this number of significant figures when transferring reagents from one container to another.
The next pages contain the virtual lab as part of an interactive feedback activity. Please think about the above questions and click 'next' to continue to the activites.
|Last Updated: Thursday, April 2nd, 2020 @ 01:36:31 pm|