ERIC Number: EJ1438206
Record Type: Journal
Publication Date: 2024-Aug
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: EISSN-1938-1328
Chemistry in a Bottle
Thomas S. Kuntzleman; Andrea Matti; Dajena Tomco
Journal of Chemical Education, v101 n8 p3606-3610 2024
A mixture of salt water and isopropyl alcohol is immiscible, forming two separate liquids with the organic layer on top and aqueous layer on bottom. When universal indicator is added to such a mixture, all of the indicator compounds in the universal indicator preferentially dissolve in the alcohol--except for phenolphthalein at high pH. Mixtures of alcohol, salt water, and universal indicator in a bottle can be made to display a variety of layered color effects within the bottle by adjusting the pH. The various phenomena observed can be tied to an assortment of chemical topics including density, the classification of matter, solubility, intermolecular forces, and acid-base chemistry.
Descriptors: Chemistry, Color, Science Education, Scientific Concepts, Classification, Molecular Structure, Demonstrations (Educational), Hands on Science, Undergraduate Study
Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A