Understanding Galvanic Cells

The video explains galvanic cells, also known as voltaic cells, which use thermodynamically favorable redox reactions to generate electric current. It details the oxidation and reduction half reactions involving zinc and copper, and how these reactions are used to produce electric current. The video also covers the components of a galvanic cell, including the anode, cathode, and salt bridge, and explains their roles in maintaining charge balance and facilitating electron flow. Finally, it summarizes the process and notes that the cell stops working when equilibrium is reached.

What is the primary function of a galvanic cell?

• To store chemical energy

• To generate an electric current

• To produce light

• To increase temperature

In a galvanic cell, what happens to zinc metal during the oxidation half-reaction?

• It forms a precipitate

• It loses electrons

• It gains electrons

• It remains unchanged

What is the role of the compartments in a galvanic cell?

• To store energy

• To decrease resistance

• To separate the half-reactions

• To increase voltage

Which component of a galvanic cell is responsible for oxidation?

• Salt bridge

• Voltmeter

• Anode

• Cathode

What is the function of the salt bridge in a galvanic cell?

• To increase temperature

• To generate electricity

• To balance charges

• To store ions

In which direction do anions move in the salt bridge?

• Toward the electrolyte

• Toward the center

• Toward the anode

• Toward the cathode

What happens to the voltage of a galvanic cell when it reaches equilibrium?

• It becomes zero

• It decreases

• It increases

• It fluctuates

What is the initial voltage of the described galvanic cell at 25 degrees Celsius?

• 0.5 volts

• 1.10 volts

• 2.0 volts

• 3.5 volts

What is another name for a galvanic cell?

• Electrolytic cell

• Voltaic cell

• Fuel cell

• Solar cell

What is the purpose of the voltmeter in a galvanic cell?

• To measure current

• To measure electric potential difference

• To measure temperature

• To measure resistance