Effects of Metal Ions on Viscosity of Aqueous Sodium Carboxylmethylcellulose Solution and Development of Dropping Ball Method on Viscosity

Autor/inn/en	Set, Seng; Ford, David; Kita, Masakazu
Titel	Effects of Metal Ions on Viscosity of Aqueous Sodium Carboxylmethylcellulose Solution and Development of Dropping Ball Method on Viscosity
Quelle	In: Journal of Chemical Education, 92 (2015) 5, S.946-949 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/ed500694h
Schlagwörter	Science Instruction; Molecular Structure; Metallurgy; Chemistry; High School Students; Secondary School Science; Scientific Concepts; Concept Formation; Science Laboratories; College Science; Laboratory Equipment; Laboratory Experiments; Undergraduate Study; Hands on Science; Grade 10; Foreign Countries; Japan + Suchen Sie Ihr Suchwort? Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Hüttenwesen; Chemie; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Concept learning; Begriffsbildung; Laborausstattung; Laboratory work; Laborarbeit; Grundstudium; Ausland
Abstract	This research revealed that metal ions with different charges could significantly affect the viscosity of aqueous sodium carboxylmethylcellulose (CMC) solution. On the basis of an Ostwald viscometer, an improvised apparatus using a dropping ball for examining the viscosity of liquids/solutions has been developed. The results indicate that the colloidal size of CMC aggregations is changed mainly by the metal cation charge. The improvised apparatus was introduced to high school students in a lesson on viscosity and intermolecular interaction where the students could examine the viscosity of several solutions and compare it with an aqueous sodium CMC solution. Although there are some limitations, the results show that the apparatus can be useful in helping high school students to understand the concept of viscosity. (As Provided).
Anmerkungen	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
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01