Which of the following is false about a Voltaic cell?
A Galvanic Cell represents a spontaneous electrochemical cell
Examining a Galvanic Cell
Concept #1: A Galvanic Cell uses a spontaneous redox reaction in order to produce electricity.
Example #1: The purpose of a galvanic cell is to:
a) Purify solids
b) Allow for only oxidation
c) Generate electricity
d) To consume electricity
Concept #2: A typical galvanic cell has major components that harness the power of a spontaneous redox reaction.
Example #2: Which of the following statements is true for a salt bridge dealing with the following redox reaction:
Mg (s) + Cd2+ (aq) → Mg2+ (aq) + Cd (s)
a) Its bromide ions will flow to the magnesium half-cell.
b) Its bromide ions will flow to the cadmium half-cell.
c) Contains neutral atoms that interact with the ions in both half-cell compartments.
d) Its sodium ions will flow to the magnesium half-cell.
Concept #3: The anode decreases in mass and the cathode increases in mass over time.
Example #3: How many electrons would be transferred between a sodium and gallium electrode from the following?
Ga3+ (aq) + 3 e – → Ga (s)
Na (s) → Na+ (aq) + e –
Concept #4: Galvanic Cells represent spontaneous electrochemical cells.
Example #4: A reduction reaction with an equilibrium constant of 4.8 x 102
a) Is nonspontaneous and has a positive Eºcell
b) Has a negative ∆Gº and produces electricity
c) Has discharged all electricity and is a dead battery
d) Is spontaneous and has a negative Eºcell
For the following redox reaction label: the anode, cathode, half-reactions occurring at each half-cell, direction of electron flow, and direction of neutral ions flow.
