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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 16
(2011) pp 264-266
Determining the Solubility Product of Nickel Hydroxide – A General Chemistry Experiment
Mara Bertrand Campos de Araujo and Suzana Trindade Amaral*
Chemistry Institute, Federal University of Rio Grande
do
Sul, Av. Bento Gonçalves 9500, CP: 15003, CEP: 91501-970, Porto Alegre, RS, Brazil,
stamaral@iq.ufrgs.br
Received March 23, 2011. Accepted July 16, 2011.
Published: 30 September 2011
Abstract. The manuscript proposes a simple and inexpensive experiment, which can be used in an introductory experimental chemistry course. Three different ways of carrying out the experiment are presented so that it can be adapted to the laboratory facilities. The experiment deals with equilibrium and stoichiometry basic concepts applying several fundamental laboratory techniques and simple calculations. The proposed experiment can be performed in a laboratory class lasting from 2 or 4 hours. The experiment was tested in a group of 142 students of General Chemistry from the Federal University of Rio Grande do Sul.
Key Words: Laboratories and Demonstrations; general chemistry; nickel hydroxide; solubility equilibrium; colorimetry
(*) Corresponding author. (E-mail: stamaral@iq.ufrgs.br)
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