a voltaic ( or electrochemical) cell?

Question

1. involves reduction, which is a loss of electrons.

2. converts chemical energy to electrical energy

3. converts electrical energy to chemical energy

4. involves electrolysis reactions which always produce a gas at at least one electrode.

5. involves oxidation, which is a gain of electrons.



Another question::
A copper wire dipped in a solution containing Ag(CN)2^- ions acquires a silver coating because:

1. Ag+ oxidizes Cu to Cu^2+ in a spontaneous process until silver metal completely covers the Cu.

2. Cu^2+ is stronger ox agent tahn Ag^+

3. H^+ reduced by Cu to H2, & Ag^+ ions are reduced by H2 to metallic silver.

4. Ag is a stronger reducing agent than Cu.

Answer 1

a 2.

Another: 1.

Answer 2

A galvanic cellular contains 2 0.5-cells. each 0.5-cellular has: (a million) an electrode, which interior the determine are the plates of Zn (zinc) and Cu (copper); and (2) an electrolyte, which interior the determine are aqueous recommendations of ZnSO4 and CuSO4. The metallic of a steel electrode has a tendency to flow into answer, thereby freeing certainly charged metallic ions into the electrolyte, and protecting negatively charged electrons on the electrode. for that reason each 0.5-cellular has its own 0.5-reaction. For the Daniell cellular, depicted interior the determine, the Zn atoms have a greater tendency to flow into answer than do the Cu atoms. greater precisely, the electrons on the Zn electrode have a greater effective potential than the electrons on the Cu electrode. because of the fact the electrons have unfavorable fee, to grant electrons on it a greater effective potential the Zn electrode could have a greater unfavorable electric powered ability than the Cu electrode. despite the fact that, interior the absence of an exterior connection between the electrodes, no modern can flow.