Understanding Voltaic Cells and Electrode Potentials

The video explains how to create a voltaic cell by separating oxidation and reduction reactions, connecting them with a wire to form a battery. It discusses the roles of the anode and cathode, the factors affecting voltage, and how to calculate the electromotive force using standard electrode potentials. The video concludes with constructing a 1.1-volt battery under standard conditions.

What is the primary function of separating oxidation and reduction reactions in a voltaic cell?

• To decrease the pressure inside the cell

• To allow electrons to flow through a wire

• To prevent the cell from discharging

• To increase the temperature of the cell

In a voltaic cell, where do the electrons originate?

• From the zinc bar

• From the cathode

• From the copper ions

• From the electrolyte solution

What is the term used for the negative electrode in a battery?

• Terminal

• Cathode

• Anode

• Electrolyte

Which factors influence the voltage of a battery?

• Type of wire used

• Size and weight of the battery

• Concentration, pressure, and temperature

• Color and shape of the electrodes

What is the significance of standard electrode potentials?

• They show the temperature of the reaction

• They indicate the size of the battery

• They measure the likelihood of an ion grabbing electrons

• They determine the color of the solution

What is the standard electrode potential for copper ions turning into solid copper?

• 0.76 volts

• 0.34 volts

• -0.76 volts

• -0.34 volts

How is the total electromotive force of a galvanic cell calculated?

• By subtracting the potentials of the electrodes

• By adding the potentials of the electrodes

• By multiplying the potentials of the electrodes

• By dividing the potentials of the electrodes

What is the total voltage of a standard galvanic cell with zinc and copper electrodes?

• 1.5 volts

• 1.1 volts

• 0.34 volts

• 0.76 volts

What is one method to measure the voltage difference in a battery?

• Using a barometer

• Using a hygrometer

• Using a voltmeter

• Using a thermometer

What is the reaction needed for a galvanic cell involving zinc?

• Zinc ions becoming solid zinc

• Zinc losing electrons

• Zinc gaining electrons

• Zinc reacting with copper