Th 10_14_10 Chapter 6

Th 10_14_10 Chapter 6 - Chapter6:...

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Chapter 6: Some Types of Chemical Reactions 6 Selected Chapter 6 Exercises 1 9 odd, 13 21odd, 29, 31, 35, 39, 41 45, 47, 51, 53, 55, 57 65odd, 66, 69, 73, 77, 81, 89, 91, 95, 99 107, 113, 115, 121, 135, 128.
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Classification of Solutes What is an aqueous solution? 1. mix solute + solvent 2. solvent = water 3. solute = ? A. dissolution process A C H O C H O A. C 6 H 12 6 (s) C 6 H 12 6(aq) B. MX (s) M + (aq) + X B. Let’s look at the classes of solutes. 4 Types of Solutes: What do we observe in these situations? 5
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What did we observe? Two Classes of Solutes ELECTROLYTES NONELECTROLYTES 6 What did we observe? ELECTROLYTES Dissociate or Ionize in solution For Example: They conduct electricity in water. Chemical Sources ii d MX (s) M + (aq) + X (aq) ionic compounds molecular acids and bases 7
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What did we observe? NONELECTROLYTES D t Th d NOT Come from molecula Do not dissociate/ionize in water. They do NOT conduct electricity in water. molecular compounds dissolved in H 2 O. Examples: C 2 H 5 OH, ethanol C 6 H 12 O 6 , glucose 8 C 12 H 22 O 11 , sucrose Electrolytes Further Study: What do we observe in these situations? 9
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Electrolytes Strong Weak Dissociate/Ionize 100% Conduct Electricity well even in dilute solutions Do NOT Dissociate/Ionize Do not conduct electricity well in dilute solutions. Examples: Examples: 10 Examples: STRONG ELECTROLYTES : 1. HCl, HNO 3 , etc. strong soluble molecular acids 2. NaOH, KOH, etc. strong soluble ionic bases 3. NaCl, KBr, etc. soluble ionic salts ionize in water essentially 100% WEAK ELECTROLYTES 1. Weak acids: Acetic acid, CH 3 COOH Oxalic acid, (COOH) 11 2 2. Weak bases Ammonia, NH 3 Iron(III) hydroxide, Fe(OH) 3 3. some soluble covalent salts ionize in water much less than 100%
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Acids Up Close and Personal What is an ACID? Substances that generate H + or H O + ions in Substances that generate H or H 3 O ions in aqueous solutions. HX (g) H + (aq) + X (aq) OR HX (g) + H 2 O H 3 O + (aq) + X (aq) Two sub types… 12 Acids Up Close and Personal STRONG ACIDS : Ionize 100% in water.
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This note was uploaded on 10/28/2010 for the course CHEM 1211 taught by Professor Bro during the Spring '10 term at Université de Genève.

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Th 10_14_10 Chapter 6 - Chapter6:...

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