CHM 132 Chapter Notes - Chapter 11: Galvanic Cell, Membrane Potential, Voltmeter

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silverbee937

6 Mar 2017

School

University of Rochester

Department

Chemistry

Course

CHM 132

Professor

Kara Bren

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Document Summary

If you separate the two half reactions of a full reactions in different containers with a wire passing between them, then e- will flow from the oxidized reaction to the reduced reaction. Without a salt bridge or porous disk, the flow of electrons will stop pretty quickly because of the build-up of charge on either side. These elements allow ion flow without extensive mixing of solutions and therefore balance charge on both sides. Galvanic cell a device in which chemical energy is changed to electrical energy in a spontaneous way (eo > 0) Anode electrode that is in the solution undergoing oxidation. Cathode electrode that is in the solution undergoing reduction: electrons flow from anode to cathode. Standard states (cid:1005) at(cid:373) = p, (cid:1006)5 c = t, (cid:1005)m = [ ], I(cid:374) o(cid:396)de(cid:396) to (cid:272)(cid:396)eate o(cid:374)e"s o(cid:449)(cid:374) (cid:272)ell: take two standard reduction reactions and their potentials.

Related Questions

Galvanic cells harness spontaneous oxidation-reduction reactions to produce work by producing a current. They do so by controlling the flow of electrons from the species oxidized to the species reduced. How is a galvanic cell designed? What is in the cathode compartment? The anode compartment? What purpose do electrodes serve? Which way do electrons always flow in the wire connecting the two electrodes in a galvanic cell? Why is it necessary to use a salt bridge or a porous disk in a galvanic cell? Which way do cations flow in the salt bridge? Which way do the anions flow? What is a cell potential and what is a volt?

ceruleanclam950

1.) When balancing oxidationâreduction reactions in acidic solution by the half-reaction method, the
addition of the reactant H+ is required to balance the product
a. O2. b. OHâ. c. O. d. H2O. e. none of these

2.) Which of the following statements is true for a voltaic (galvanic) cell?
a. The electron flow is from the positive electrode to the negative electrode.
b. The electron flow is from the anode to the cathode.
c. The electron flow is from the negative cathode to the positive anode.
d. The electron flow is through the salt bridge.

3.) The anode in a voltaic cell and in an electrolytic cell is
a. the site of oxidation and of reduction, respectively.
b. the site of reduction and of oxidation, respectively.
c. the site of oxidation in both cells.
d. positive in both cells.

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CHM 132 Chapter Notes - Chapter 11: Galvanic Cell, Membrane Potential, Voltmeter

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