3.1.11.2 Using Electrode Potentials

• The standard electrode potential measures the tendency of a species to be oxidized at the electrode.

  False
• Standard electrode potentials are essential for understanding the behavior of electrochemical cells.


  True
• What is the role of the platinum electrode in the SHE?

  Provides a surface for redox reaction
• The SHE has a defined standard electrode potential of 0 V.
• The standard electrode potential of the SHE is defined as 0 V.

  True
• The hydrogen ion concentration in the SHE is 1 mol dm^-3.

  True
• Oxidation occurs at the anode in an electrochemical cell.


  True
• The cell potential is calculated using the formula E°cell = E°cathode - E°anode.


  True
• Increased temperature decreases the cell potential in the Nernst equation.

  True
• Standard electrode potentials indicate the tendency of a species to be reduced.

  True
• Match the SHE component with its description:

  Platinum Electrode ↔️ Inert metal surface for redox reaction

  H+ Solution ↔️ 1 mol dm^-3 concentration of hydrogen ions

  H2 Gas ↔️ Hydrogen gas at 1 atm pressure
• Arrange the following components of an electrochemical cell in the order they appear in a cell diagram.

  1️⃣ Anode

  2️⃣ Anode solution

  3️⃣ Salt bridge

  4️⃣ Cathode solution

  5️⃣ Cathode
• What are the two components used to build electrochemical cells?

  Half-cells and salt bridge
• What is the format of a cell diagram for an electrochemical cell?

  Anode | Anode solution || Cathode solution | Cathode
• The cell potential is calculated using the standard electrode potentials as E°cathode - E°anode
• Under standard conditions, the cell potential is equal to the standard cell potential
• If E°cell is positive, the cell reaction is spontaneous.


  True
• Order the steps to predict the direction of a redox reaction:

  1️⃣ Identify the oxidation and reduction half-reactions

  2️⃣ Calculate the overall cell potential

  3️⃣ Interpret the cell potential
• What are standard electrode potentials measured against?

  Standard hydrogen electrode
• What is the defined standard electrode potential of the SHE?

  0 V
• The SHE allows the relative reducing or oxidizing tendencies of different species to be compared.
• What does the standard electrode potential indicate about a species?

  Tendency to be reduced
• What is the standard hydrogen electrode (SHE) used for?

  Defining standard electrode potentials
• What is the pressure of hydrogen gas in the SHE?

  1 atm
• What is used to connect two half-cells in an electrochemical cell?

  Salt bridge
• The salt bridge in an electrochemical cell allows ion flow to balance charge.
• Faraday's constant has a value of 96,485 C mol^-1.
• Under what conditions are standard electrode potentials measured?

  Standard conditions
• What is the standard pressure for measuring standard electrode potentials?

  1 atm
• Where does oxidation occur in an electrochemical cell?

  Anode
• The salt bridge in an electrochemical cell maintains electrical neutrality
• The cathode is where the oxidizing agent gains electrons.


  True
• Temperature and reactant concentrations are key factors affecting cell potential.

  True
• What determines the spontaneity of a cell reaction?

  Standard cell potential (E°cell)
• What does a higher positive standard electrode potential indicate?

  Greater tendency for reduction
• Match the half-reaction with its role in the reaction:

  Cu²⁺/Cu ↔️ Cathode (reduction)

  Zn²⁺/Zn ↔️ Anode (oxidation)
• Standard electrode potentials are measured under standard conditions, which include a temperature of 25°C.
• What are the conditions for the standard hydrogen electrode (SHE)?

  1 atm pressure and 1 mol dm^-3 H+
• Standard electrode potentials are measured relative to the SHE.


  True
• Why is the SHE used as a reference electrode?

  To compare reducing tendencies