Sketch a voltaic cell for each redox reaction. Label the...

Name: Problem 39, Chapter 19: Chemistry: Structure and Properties
Uploaded: 2021-08-26T01:02:33-08:00
Duration: 4 min 36 s
Channel: Tracy Tourville
Description: Sketch a voltaic cell for each redox reaction. Label the anode and cathode and indicate the half-reaction that occurs at each electrode and the species present in each solution. Also indicate the direction of electron flow. a. 2 Ag+(aq) + Pb(s)-2 Ag(s) + Pb2+(aq) b. 2 ClO2(g) + 2 I-(aq)-2 ClO2-(aq) + I2(s) c. O2(g) + 4 H+(aq) + 2 Zn(s)-2 H2O(l) + 2 Zn2+(aq)

Sketch a voltaic cell for each redox reaction. Label the anode and cathode and indicate the half-reaction that occurs at each electrode and the species present in each solution. Also indicate the direction of electron flow. a. 2 Ag+(aq) + Pb(s)-2 Ag(s) + Pb2+(aq) b. 2 ClO2(g) + 2 I-(aq)-2 ClO2-(aq) + I2(s) c. O2(g) + 4 H+(aq) + 2 Zn(s)-2 H2O(l) + 2 Zn2+(aq)

Sketch a voltaic cell for each redox reaction. Label the anode and cathode and indicate the half-reaction that occurs at each electrode and the species present in each solution. Also indicate the direction of electron flow.
a. 2 Ag+(aq) + Pb(s)-2 Ag(s) + Pb2+(aq)
b. 2 ClO2(g) + 2 I-(aq)-2 ClO2-(aq) + I2(s)
c. O2(g) + 4 H+(aq) + 2 Zn(s)-2 H2O(l) + 2 Zn2+(aq)

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Transcript

00:01 This question deals with electrochemistry and with voltaic cells.

00:04 Those are spontaneous electrochemical cells.

00:08 And the first example we're asked to look at is a reaction between lead and silver.

00:15 And what we're told according to what forms in the process here is that lead undergoes this half reaction.

00:26 It gives up two electrons to form the lead two plus cadion.

00:30 And those electrons get transferred to silver to form solid silver.

00:38 This reaction is what takes place at the anode.

00:42 Anode is always where oxidation takes place.

00:46 This reaction takes place at the cathode.

00:49 That's always where reduction takes place.

00:51 Reduction is a gaining of electrons and oxidation, a loss of electrons.

00:57 A little mnemonic that can help you remember that, by the way, is anox, anode.

01:02 Oxidation and red cat reduction takes place at the cathode.

01:11 And so basically what we have going on here is that lead is going to be giving up electrons and electrons are going to flow from always the anode toward the cathode.

01:22 Lead is going to be giving up electrons supplying them to the silver plus cadion to produce or played out silver metal while lead becomes oxidized in the the anode compartment over here.

01:36 So again, this is my anode where the oxidation is taking place...

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