Chapter 21.docx

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Department
Chemistry
Course
CHM135H1
Professor
Dwayne Miller
Semester
Winter

Description
Chapter 21Redox reactions and assignment of oxidation numbers keeping track of electrons in overall stoichiometry of balanced reaction oxidization losing electrons reduction gaining electrons LEO says GER losing electrons oxidation gaining electrons reduction These oxidation numbers are assigned using the following rules 1 The convention is that the cation is written first in a formula followed by the anion For example in NaH the H is H in HCl the H is H 2 The oxidation number of a free element is always 0 The atoms in He and N for example have oxidation numbers of 0 23 The oxidation number of a monatomic ion equals the charge of the ion For example the oxidation number of Na is 1 the oxidation number of 3N is 3 4 The usual oxidation number of hy
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