Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 10  
spacerspacerIntroduction
spacerspacerObjectives
spacerspacerReading

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spacer10.1 Properties
spacerof Acids and
spacerBases

spacer10.2 Strong/Weak
spacerAcids

spacer10.3 Strong/Weak
spacerBases

spacer10.4 Neutralization
spacerReactions

spacer10.5 Calculations
spacerInvolving
spacerNeutalization
spacerReactions

spacer10.6 pH & pOH
spacerScales
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spacernextProblems

Unit 10 ACIDS & BASES AND IONIC REACTIONS

10.2 - Strong and Weak Acids

Acids are substances that produce hydronium ions, H3O+, when dissolved in water.

"Strong" acids ionize completely in water. For example,


The above reaction indicates that when hydrogen chloride gas reacts with water, hydronium ions are produced in aqueous solution. Note that the arrow points to the products, indicating that virtually ALL the HCl becomes H3O+ and Cl- ions in aqueous solution. HCl is therefore a strong acid.

"Weak" acids ionize partially in water.


Acetic acid, CH3COOH, does not completely ionize in water. Most of the acetic acid in solution remains un-ionized and a small fraction ionizes to form CH3COO- and H3O+ ions. To represent this in a chemical equation, a double arrow is used. The longer arrow pointing toward the reactants indicates that acetic acid in solution remains un-ionized. CH3COOH is a weak acid.

Important Acids:

In section 6.4 and section 6.5, we learned how to name binary acids and oxy acids.

Learn the names and formulae of six strong acids.

Learn the names and formulae of three weak acids.

 

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Animation

 

Section 15.2
The Strengths of Acids and Bases ..p409

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