Ch400Ch4LN2 - Chem 400 Chapter 4 Lecture Notes Part 2 Acids...

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Chem 400 Chapter 4 Lecture Notes Part 2 Acids and Bases • You already learned the Arrhenius definitions of acids and bases: • Acids produce H + (or H 3 O + ) in water: HA + H 2 O A - + H 3 O + • Bases produce OH - in water: MOH(aq) M + (aq) + OH - (aq) • You also learned which acids and bases are “strong”, or ionize almost completely in water. • And remember that some acids and bases produce more than 1 H + or OH - ? • For example, sulfuric acid is diprotic strong acid, while phosphoric acid is triprotic weak acid. Step 1) H 2 SO 4 + H 2 O HSO 4 - + H 3 O + Step 2) HSO 4 - + H 2 O ! SO 4 2- + H 3 O + Note that the second step losing the 2 nd proton is a reversible step. Your Turn: Write the 3 steps for the ionization of phosphoric acid. Acid/Base Rxns Acid-Base Neutralization Reactions : These are rxns where an acid and a base react together to form water and a salt. The formation of water is the driving force. This is a type of double displacement rxn. HA + MOH H 2 O + MA HNO 3 (aq) + NaOH(aq) H 2 O(l) + NaNO 3 (aq)
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This note was uploaded on 06/25/2008 for the course CHEM 400-401 taught by Professor Dr.samples during the Fall '06 term at American River.

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Ch400Ch4LN2 - Chem 400 Chapter 4 Lecture Notes Part 2 Acids...

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