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ERIC Number: EJ1062367
Record Type: Journal
Publication Date: 2015-May
Pages: 4
Abstractor: As Provided
Reference Count: 13
ISSN: ISSN-0021-9584
Effects of Metal Ions on Viscosity of Aqueous Sodium Carboxylmethylcellulose Solution and Development of Dropping Ball Method on Viscosity
Set, Seng; Ford, David; Kita, Masakazu
Journal of Chemical Education, v92 n5 p946-949 May 2015
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.
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:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: High Schools; Secondary Education; Higher Education; Postsecondary Education; Grade 10
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Japan