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Lab #9 - Ionic and Covalent Bonding Sylwester Czado...

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Ionic and Covalent Bonding Sylwester Czado Chemistry 191 Lab Report, Experiment #18 Lab Partner: Ellen Richer Instructor: Brian Corbett 12-1-05
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Introduction The purpose of doing this particular experiment was to use electrical conductivity as a way of discriminating between substances with ionic and covalent bonding. We will compare the electrical conductivity of substances in the pure solid or liquid state and in the solution. We are using this particular method to measure the effects of solvent properties on the dissociation of substances with polar covalent bonding. An example of this is using HCl. We will also measure changes in conductivity that result from the reaction of ionic substances. This will form products that are weakly ionized or insoluble. Procedure Special supplies: Conductivity apparatus (a commercial conductivity meter) and four clean beakers. Chemicals: 6 M HCl, 6 M acetic acid, marble chips CaCO 3 , zinc metal (mossy), distilled H 2 0 (l), Tap H 2 0, Methanol CH 3 OH (l), CH 3 OH (aq), Glacial acetic acid, CH 3 COOH (l), Aqueous acetic acid, CH 3 COOH (aq), Sucrose (table sugar, C 12 H 22 0 11 (aq), Aqueous sucrose C 12 H 22 0 11 (aq), Sodium chloride NaCl (s), NaCl (aq), 0.1 M HCl (aq), 0.1 M NaOH (aq). Waste Collection: Toluene and solutions of HCl (or acetic acid) in toluene should be poured into waste containers. Do not pour it down the drain.
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