A Voltaic or Galvanic Cell is an electrochemical cell that converts chemical energy into electrical energy through spontaneous oxidation-reduction reactions. It consists of two half-cells, each containing an electrode immersed in an electrolyte, where oxidation occurs at the anode and reduction occurs at the cathode. The flow of electrons from the anode to the cathode through an external circuit generates electric current, which can be harnessed to perform work, such as lighting a bulb or driving a motor
What is a Voltaic or Galvanic Cell?
Voltaic or Galvanic Cell is an electrochemical cell that converts chemical energy into electrical energy through spontaneous oxidation-reduction reactions.
What are the two main components of a Voltaic Cell?
A Voltaic Cell consists of two half-cells, each containing an electrode immersed in an electrolyte.
What is the typical voltage output of a zinc-copper Voltaic Cell?
The standard cell potential for a zinc-copper Voltaic Cell is approximately 1.1 volts.
What happens when the external circuit of a Voltaic Cell is replaced by a source of electricity?
The electrode reactions can be reversed, and the cell operates as an electrolytic cell, driving a non-spontaneous reaction.
Can a Voltaic Cell be considered a reversible cell?
Yes, a Voltaic Cell is considered a reversible cell when the external circuit is replaced by a source of electricity that opposes the cell's reactions.
What type of energy conversion occurs in a Voltaic or Galvanic Cell?
a) Electrical energy to chemical energy
b) Chemical energy to electrical energy
c) Thermal energy to electrical energy
d) Mechanical energy to chemical energy
Answer: b) Chemical energy to electrical energy
What is the role of the anode in a Voltaic Cell?
a) It is where reduction occurs.
b) It is where oxidation occurs.
c) It is the source of electrical energy.
d) It maintains electrical neutrality.
Answer: b) It is where oxidation occurs.
Which electrode is associated with reduction in a Voltaic Cell?
a) Anode
b) Cathode
c) Salt bridge
d) External circuit
Answer: b) Cathode
What is the typical voltage output of a zinc-copper Voltaic Cell?
a) 0.5 volts
b) 1.1 volts
c) 1.5 volts
d) 2.0 volts
Answer: b) 1.1 volts
What is the function of the salt bridge in a Voltaic Cell?
a) To provide a source of electrons
b) To maintain electrical neutrality
c) To facilitate oxidation
d) To increase voltage output
Answer: b) To maintain electrical neutrality