01:160:161 Lecture 9: Chapter 9 Atoms First
9 Apr 2016
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Document Summary
A solution is a homogeneous mixture of two or more substances. The substance in larger amount is the solvent and the substance in smaller amount is the solute. One can have a gaseous mixture, liquid mixture, solid mixture or a combination. Molten (melted) ionic compounds, like na+cl-, (contrast with molecular compounds, like alcohol ), or aqueous solution of ionic compounds that release cations and anions in solution, also electricity and the conduction is due to the flow of the ions. Michael faraday studied the conduction of electricity in solution. Electrolyte: a substance that, when dissolved in water results in a solution that conducts electricity. Reason: electrolytic solution contains ions that are responsible for conduction of electricity. Nonelectrolyte: a substance that, when dissolved in water results in a solution that does not conduct electricity. Reason: the solute molecules remain molecular (i. e. they do not dissociate into ions. ) e. g. sugar (glucose, sucrose ), alcohol. A substance that is partially ionized in solution.
