Lec-35-Chap18-6-bare

Lec-35-Chap18-6-bare - Lec-35-Chap18-6-bare Lec-35...

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Lec-35-Chap18-6-bare 11/28/2011 Electrolysis 1 Lec-35: Electrochemistry and its Applications Chapter 18 1 Wednesday, November 30 in Lecture Proctored Exercise                   2 2 3 3 2 2 red anode ox 3 2 3 2 2 3 0.0V 2H O H g,1bar 2H O aq, 2 2H O aq, 2 2H O H g,1bar 0.0592 As a reductio V 1 H O / H H O / H lo n g 2 HO x x x Ce E E E E     Measurement of pH Consider the following electrochemical cell             3 23 acid solution of unknown concentration standard 2 standard hydrogen electrode Pt s |H g,1bar |H O aq, aq,C |H g,1bar |Pt C s || x 2
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Lec-35-Chap18-6-bare 11/28/2011 Electrolysis 2           cell cathode anode re ce d red cell red ox 2 red red cell red ox 3 2 0.0V 3 cel 3 ll l 0.0592V 0.0592V 1 log log H O 22 HO 0.0592V log pH 0.059 H O 0.0 V p 2 592V H x x x E E E E E E E E E E E        Measurement of pH Consider the following electrochemical cell             3 23 acid solution of unknown concentration standard 2 standard hydrogen electrode Pt s |H g,1bar |H O aq, aq,C |H g,1bar |Pt C s || x 3 Electrolysis Electrons are forced into the electrochemical system from an external power source (a battery) so that an unfavorable reaction takes place. Like in voltaic cells, electrolysis cells have two electrodes connected externally to a power source. A simple example is the electrolysis of a molten salt. 4
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Lec-35-Chap18-6-bare 11/28/2011 Electrolysis 3 reduction, cathode negative, cations migrate to it    oxidation, anode positive, anions migrate to it 5 Electrolysis Electrons are forced into the electrochemical system from an external power source (a battery) so that an unfavorable reaction takes place.
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This note was uploaded on 03/06/2012 for the course CHE 132 taught by Professor Hanson during the Fall '08 term at SUNY Stony Brook.

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Lec-35-Chap18-6-bare - Lec-35-Chap18-6-bare Lec-35...

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