5.4.1 Standard electrode potentials

• What is the standard electrode potential defined as?

  Potential relative to SHE
• A half-cell with a more positive standard electrode potential has a higher tendency to be reduced.


  True
• Standard electrode potential values help determine the spontaneity and direction of electron flow in electrochemical cells.


  True
• The standard electrode potential of the standard hydrogen electrode (SHE) is 0.00 V.
• Steps to set up a standard hydrogen electrode (SHE)

  1️⃣ Immerse a platinum electrode in 1 M H⁺ solution

  2️⃣ Bubble H₂ gas around the electrode

  3️⃣ Ensure standard conditions (298 K, 1 atm)
• A voltmeter measures the potential difference between the two half-cells.
• A salt bridge allows ion flow between the two half-cells
• What does the standard electrode potential measure?

  Reduction tendency
• What is the standard pressure for measuring standard electrode potentials?

  1 atm
• What does a more positive standard electrode potential indicate?

  Higher reduction tendency
• A galvanic cell converts chemical energy into electrical energy.


  True
• An electrolytic cell requires an external power source
• The salt bridge in an electrochemical cell maintains electrical neutrality.


  True
• The standard electrode potential (E⁰) measures a half-cell's tendency to undergo reduction
• What does a negative standard electrode potential indicate for a half-cell?

  Higher oxidation tendency
• What does a positive standard electrode potential value indicate?

  Higher tendency for reduction
• By comparing the standard electrode potentials of two half-cells, we can determine the tendency for reduction
• What does the standard electrode potential measure?

  Tendency to undergo reduction
• A half-cell with a more positive E⁰ becomes the cathode
• A positive E⁰ difference indicates a spontaneous redox reaction.


  True
• A redox reaction is spontaneous if the E⁰cell is greater than zero
• A negative E⁰cell value indicates a non-spontaneous reaction.

  True
• What is the purpose of electroplating in industrial processes?

  Enhance surface properties
• A metal with a more negative E⁰ is used as a sacrificial anode for corrosion protection.


  True
• The standard electrode potential is measured under standard conditions, including a temperature of 298 K
• An electrochemical cell converts chemical energy into electrical energy in a galvanic cell.
• What type of redox reactions occur in a galvanic cell?

  Spontaneous
• What are the standard conditions for measuring standard electrode potential?

  298 K, 1 atm, 1 M
• A more negative standard electrode potential indicates a higher tendency for oxidation.

  True
• What is the role of the salt bridge in an electrochemical cell?

  Allows ion flow
• What is the standard electrode potential of the standard hydrogen electrode (SHE)?

  0.00 V
• A voltmeter measures the potential difference between two half-cells.


  True
• The standard temperature for measuring standard electrode potentials is 298 K
• The standard concentration for measuring standard electrode potentials is 1 M.


  True
• A more negative standard electrode potential indicates a higher tendency for oxidation
• What type of redox reactions occur in a galvanic cell?

  Spontaneous
• What material is used as the electrode in the standard hydrogen electrode (SHE)?

  Platinum
• Order the tendency of reduction based on standard electrode potential values from highest to lowest.

  1️⃣ Positive E⁰ values

  2️⃣ 0.00 V

  3️⃣ Negative E⁰ values
• Comparing the standard electrode potentials of two half-cells helps determine the direction of electron flow
• Negative E⁰ values indicate a higher tendency for oxidation.


  True