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Autoionization of Water

Autoionization of Water. H 2 O (l) + H 2 O (l). H 3 O + (aq) + OH - (aq). . . . OR. H + (aq) + OH - (aq). H 2 O (l). K w = [H + (aq) ] [OH - (aq ) ] = 1.0 X 10 -14 at SATP. In neutral solutions [H + (aq) ] = [OH - (aq) ]

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Autoionization of Water

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  1. Autoionization of Water H2O (l) + H2O (l) H3O+(aq) + OH-(aq) . . . OR . . . H+(aq) + OH-(aq) H2O (l) Kw = [H+(aq) ] [OH-(aq) ] = 1.0 X 10 -14 at SATP In neutral solutions [H+(aq) ] = [OH-(aq) ] In acidic solutions [H+(aq) ] > [OH- (aq) ] In basic solutions [H+(aq) ] < [OH-(aq) ]

  2. pH = - log [H+ (aq) ] OR pH = - log [H3O+ (aq) ] pOH = - log [OH-(aq) ] pH + pOH = 14 at SATP

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