Solubility and Solubility Product Determination of a Sparingly Soluble Salt: A First-Level Laboratory Experiment

被引：2
|
作者：
Bonomo, Raffaele P. [1 ]
Tabbi, Giovanni [2 ]
Vagliasindi, Laura I. [1 ,3 ]
机构：
[1] Univ Catania, Dipartimento Sci Chim, I-95125 Catania, Italy
[2] Ist Biostrut & Bioimmagini CNR Catania, I-95125 Catania, Italy
[3] Consorzio Interuniv CIRCSMB, I-70125 Bari, Italy
来源：
JOURNAL OF CHEMICAL EDUCATION | 2012年 / 89卷 / 04期
关键词：
First-Year Undergraduate/General; Inorganic Chemistry; Laboratory Instruction; Physical Chemistry; Hands-On Learning/Manipulatives; Aqueous Solution Chemistry; Precipitation/Solubility; CALCIUM-SULFATE; KSP;
D O I：
10.1021/ed2003143
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A simple experiment was devised to let students determine the solubility and solubility product, K-sp, of calcium sulfate dihydrate in a first-level laboratory. The students experimentally work on an intriguing equilibrium law: the constancy of the product of the ion concentrations of a sparingly soluble salt. The determination of solubility is proposed either in an equimolar precipitation of CaSO4 center dot 2H(2)O, from which the K-sp is obtained, or working with an excess of one of the two reagents.
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页码：545 / 547
页数：3
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