Presentation Title

Chemical Kinetics of Bismuth Crystallization: An Educational Approach

Faculty Mentor

Jared M. Ashcroft

Start Date

17-11-2018 12:30 PM

End Date

17-11-2018 2:30 PM

Location

CREVELING 45

Session

POSTER 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Kinetics is an often complicated topic for beginning STEM students. Due to the ease with which bismuth crystals can be grown in a laboratory setting, several students from the Pasadena City College General Chemistry and Geosciences departments have designed a series of experiments to be used as a tool to demonstrate the concept of chemical kinetics as it pertains to crystal growth.

In order to analyze the effects of various factors on crystallization, pure bismuth metal will first be melted down in glass beaker using a bunsen burner or hot plate. Independent variables such as cooling time and doping (or the introduction of impurities) will then be manipulated individually in order to examine the impacts these variables may have on crystallization. The reaction rates of the bismuth will be observed during the crystallization process, and the resulting bismuth crystals will then be examined with a scanning electron microscope to observe any notable changes in the crystal structure.

Based on the results of the analysis, a live demonstration will be prepared for the purposes of educational outreach as a supplemental tool for beginning Chemistry and Geosciences students. Additionally, any visually appealing crystals will be sold in the Pasadena City College Dana Club mineral sale to support geological field studies.

This document is currently not available here.

Share

COinS
 
Nov 17th, 12:30 PM Nov 17th, 2:30 PM

Chemical Kinetics of Bismuth Crystallization: An Educational Approach

CREVELING 45

Kinetics is an often complicated topic for beginning STEM students. Due to the ease with which bismuth crystals can be grown in a laboratory setting, several students from the Pasadena City College General Chemistry and Geosciences departments have designed a series of experiments to be used as a tool to demonstrate the concept of chemical kinetics as it pertains to crystal growth.

In order to analyze the effects of various factors on crystallization, pure bismuth metal will first be melted down in glass beaker using a bunsen burner or hot plate. Independent variables such as cooling time and doping (or the introduction of impurities) will then be manipulated individually in order to examine the impacts these variables may have on crystallization. The reaction rates of the bismuth will be observed during the crystallization process, and the resulting bismuth crystals will then be examined with a scanning electron microscope to observe any notable changes in the crystal structure.

Based on the results of the analysis, a live demonstration will be prepared for the purposes of educational outreach as a supplemental tool for beginning Chemistry and Geosciences students. Additionally, any visually appealing crystals will be sold in the Pasadena City College Dana Club mineral sale to support geological field studies.