Chemistry 34 Monday, November 27, 2006

Chemistry 34 Monday, November 27, 2006 - Monday, November...

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Monday, November 27, 2006 Chemistry STORMY WEATHER What is an electrolyte? How do you know if a salt will precipitate upon mixing solutions? Text: Sections 10.5 – 10.8 ELECTROLYTES 1. Definition a. Conducts electricity when dissolved Requirement: mobile charge carriers (Cu wire e-) (Solution ions) 2. Strong electrolyte: a. Completely dissociates to ions when dissolved Non-Electrolyte: a. dissolves as neutral molecules b. does not conduct electricity 3. Testing for Electrolytes a. Brighter light = more ions Electrolyte Light Bulb #of Ions Type Distilled Water Dark None Non-Electrolyte 0.1 M Sugar Dark None Non-Electrolyte 0.1 M NaCl Bright Lots Strong Electrolyte 0.0001 M NaCl Dim Few Strong Electrolyte 0.1 M HCl Bright Lots Strong Electrolyte 0.1 M HC2H3O2 Dim Few Weak Electrolyte 4. Weak electrolyte: a. Upon dissolving: i. Some exist as ions ii. Some exists neutral molecules Different measures Note : all ionic compounds are strong electrolytes
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Chemistry 34 Monday, November 27, 2006 - Monday, November...

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