CHEM104 Lecture Notes - Lecture 16: Hypochlorite, Sulfite, Acid Strength

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Acid hydrolysis
oDefinition- reaction of weak acid with water
oStrong acid- complete ionization because weak bond
oWeak acid- slight ionization because strong bond
Base hydrolysis
oDefinition- reaction of weak base with water
oStrong base- complete ionization because weak bond
oWeak base- slight ionization because strong bond
Summary
oA solution of the salt of a weak acid will be basic, pH>7
oA solution of the salt of a weak base will be acidic, pH<
7
oA solution od the salt of a strong base or strong acid will
be neutral, pH=7
Simple Half Reactions
Definitions
oReduction half reactions- electron(s) on lhs.
Charge reduces
Oxidation half-reactions- electron(s) on rhs.
Both atoms and charge are balanced in a half
reaction
The standard reduction potential, Eredo, is given in
volts
Oxidation Numbers
Description
oThe hypothetical charge assigned by a set of rules to
an atom in a molecule or a polyatomic ion
oOxidation number identified the effective charge on
each atom in a complex ion
oIon valence= oxidation number of all atoms
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