Lecture 16.docx

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Department
Chemistry & Chemical Biology
Course
CHEM 1214
Professor
Thomas Gilbert
Semester
Spring

Description
Lecture 16 (2/20/13) • Water: An Amphiprotic Substance: o Amphiprotic:  Capable of acting as an acid or a base. o Water as a base:  HNO (aq) + H O(l) →  NO (aq) + H O (aq) + + 3 +2 3 3           (H  donor)  (H  acceptor) o Water as an acid: + −  NH (3q) + H O2l) ⇌ NH (aq)4+ OH (aq) (H  acceptor) (H  donor) • The pH Scale: + o pH = −log[H ] o pOH = −log[OH ] − −14  + − o K  =w1 × 10 = [H 3 ][OH ]
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