ph - Chapter 9 Acids and Bases Ionization of Water The pH...

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LecturePLUS Timberlake1 Chapter 9 Acids and Bases Ionization of Water The pH Scale
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LecturePLUS Timberlake2 Ionization of Water Occasionally, in water, a H + is transferred between H 2 O molecules . . . . . . . . H : O : + : O : H H : O : H + + : O : H - . . . . . . . . H H H water molecules hydronium hydroxide ion (+) ion (-)
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LecturePLUS Timberlake3 Pure Water is Neutral Pure water contains small, but equal amounts of ions: H 3 O + and OH - H 2 O + H 2 O H 3 O + + OH - hydronium hydroxide ion ion 1 x 10 -7 M 1 x 10 -7 M H 3 O + OH -
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LecturePLUS Timberlake4 Ion Product of Water K w [ ] = Molar concentration K w = [ H 3 O + ] [ OH - ] = [ 1 x 10 -7 ][ 1 x 10 -7 ] = 1 x 10 -14
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LecturePLUS Timberlake5 Acids Increase H + HCl (g) + H 2 O (l) H 3 O + (aq) + Cl - (aq) More [H 3 O + ] than water > 1 x 10 -7 M As H 3 O + increases, OH - decreases [H 3 O + ] > [OH - ] H 3 O + OH -
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LecturePLUS Timberlake6 Bases Increase the hydroxide ions (OH - ) H 2 O NaOH (s) Na + (aq) + OH - (aq) More [OH - ] than water, [OH - ] > 1 x 10 -7 M When OH - increases, H 3 O + decreases [OH - ] > [H 3 O + ] H 3 O + OH -
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LecturePLUS Timberlake7 Using K w The [OH - ] of a solution is 1.0 x 10 - 3 M. What is the [H 3 O + ]? K w = [H 3 O + ] [OH - ] = 1.0 x 10 -14 [H 3 O + ] = 1.0 x 10 -14 [OH - ] [H 3 O + ] = 1.0 x 10 -14 = 1.0 x 10 -11 M 1.0 x 10 - 3
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Learning Check pH1 The [H 3 O + ] of lemon juice is 1.0 x 10 -3 M. What is the [OH
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ph - Chapter 9 Acids and Bases Ionization of Water The pH...

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