Electrochemical Mastery: Understanding Potentials and Cells

What is the standard electrode potential of a hydrogen electrode?

• 0.00 V

• 1.23 V

• -0.76 V

• 0.34 V

Which electrode potential would be considered the most positive?

• Ag/Ag^+ (+0.80 V)

• Zn/Zn^2+ (-0.76 V)

• Cu/Cu^2+ (+0.34 V)

• Fe/Fe^2+ (-0.44 V)

How do you calculate the standard cell potential (E°cell) for an electrochemical cell?

• By adding the standard electrode potentials of the anode and cathode

• By subtracting the standard electrode potential of the anode from that of the cathode

• By multiplying the standard electrode potentials of the anode and cathode

• By dividing the standard electrode potential of the anode by that of the cathode

What is the standard electrode potential for the reduction of Cu^2+ to Cu?

• +0.34 V

• -0.34 V

• +0.76 V

• -0.76 V

If the standard electrode potential for the half-cell reaction Mg^2+/Mg is -2.37 V, what is the potential for the reverse reaction Mg/Mg^2+?

• +2.37 V

• -2.37 V

• 0.00 V

• +1.18 V

In an electrochemical cell, if the electrode potential at the cathode is +0.80 V and at the anode is -0.44 V, what is the cell potential?

• +0.36 V

• +1.24 V

• -1.24 V

• -0.36 V

Which of the following metals would be the best choice for the cathode in terms of standard electrode potential?

• Li/Li^+ (-3.04 V)

• Na/Na^+ (-2.71 V)

• K/K^+ (-2.93 V)

• F_2/F^- (+2.87 V)

What is the effect of increasing the concentration of the cathodic solution on the cell potential?

• It increases the cell potential.

• It decreases the cell potential.

• It does not affect the cell potential.

• It reverses the cell potential.

Which of the following statements is true regarding standard electrode potentials?

• They are measured under standard conditions of 25°C, 1 atm pressure, and 1 M concentration.

• They are independent of temperature and pressure.

• They always remain constant regardless of the concentration of the solutions involved.

• They are only applicable to gases and not to solutions.

What is the standard cell potential for a cell made up of a standard hydrogen electrode and a Cu/Cu^2+ electrode?

• +0.34 V

• -0.34 V

• +1.10 V

• -1.10 V