Understanding Galvanic Cells

The video tutorial explains galvanic cells, which are devices that convert chemical energy into electrical energy. It covers the operation of galvanic cells, including the roles of electrodes, oxidation, reduction, and the salt bridge. The tutorial also discusses cell potential, its calculation, and the construction of galvanic cells to enhance voltage and current. Key concepts such as the flow of electrons, the importance of maintaining charge neutrality, and the differences between galvanic and electrolytic cells are highlighted.

What is the primary function of a galvanic cell?

• To convert chemical energy into electrical energy

• To generate heat energy

• To convert electrical energy into chemical energy

• To store electrical energy

In a galvanic cell, where does oxidation occur?

• In the salt bridge

• In the solution

• At the anode

• At the cathode

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

• To store electrons

• To act as a catalyst

• To prevent the buildup of charge

• To increase the voltage

How can you determine if a half-reaction is an oxidation reaction?

• Electrons are on the right side of the equation

• The reaction involves gaining electrons

• Electrons are on the left side of the equation

• The reaction occurs at the cathode

What does a positive cell potential indicate about a reaction?

• The reaction is non-spontaneous

• The reaction is at equilibrium

• The reaction is spontaneous

• The reaction is endothermic

What happens to the cell potential as a battery discharges?

• It remains constant

• It becomes negative

• It increases

• It decreases

How can you increase the voltage of a galvanic cell?

• By using a larger salt bridge

• By decreasing the concentration of the solution

• By connecting cells in series

• By increasing the surface area of the electrodes

What is the effect of increasing the surface area of the electrodes in a galvanic cell?

• It increases the voltage

• It increases the temperature

• It decreases the internal resistance

• It decreases the current

How can you increase the current delivered by a battery?

• By using a smaller electrode

• By increasing the concentration of the solution

• By connecting batteries in parallel

• By connecting batteries in series

What is the conventional direction of current flow in a circuit?

• From anode to cathode

• In a circular motion

• From positive to negative

• From negative to positive