Exploring Standard Electrode Potentials

What is the standard electrode potential of the hydrogen electrode?

• 0.5 V

• 0 V

• 1 V

• -0.76 V

How is the standard electrode potential measured?

• It is calculated based on the concentration of the electrolyte.

• It is determined by the temperature of the solution only.

• It is measured using a voltmeter in a non-standard environment.

• It is measured against the standard hydrogen electrode under standard conditions.

What does a positive standard electrode potential indicate?

• It indicates a greater tendency to gain electrons and undergo reduction.

• It suggests no change in the oxidation state of the substance.

• It means the substance is inert and does not participate in reactions.

• It indicates a greater tendency to lose electrons and undergo oxidation.

Which electrode is considered the reference electrode in electrochemistry?

• Calomel Electrode

• Standard Hydrogen Electrode (SHE)

• Silver/Silver Chloride Electrode

• Glass Electrode

How do you calculate the standard cell potential for a galvanic cell?

• E° = E°(anode) + E°(cathode)

• E° = E°(cathode) / E°(anode)

• E° = E°(anode) - E°(cathode)

• E° = E°(cathode) - E°(anode)

What is the significance of the Nernst equation in electrochemistry?

• It determines the speed of chemical reactions.

• It measures the temperature of the electrochemical cell.

• The Nernst equation is significant because it enables the calculation of cell potential in electrochemical reactions based on concentration, temperature, and reaction conditions.

• It provides the theoretical maximum efficiency of a battery.

What factors can affect the standard electrode potential of a half-cell?

• Temperature, concentration, pressure, and presence of other ions.

• Type of metal used in the electrode

• Surface area of the electrode

• Time of exposure to air

How do standard electrode potentials relate to spontaneity of reactions?

• Standard electrode potentials have no effect on reaction rates.

• A negative E°cell always indicates a spontaneous reaction.

• Standard electrode potentials are only relevant in acidic solutions.

• Standard electrode potentials help determine the spontaneity of reactions; positive E°cell indicates spontaneity.

What is the standard electrode potential for the reduction of copper(II) ions?

• +0.76 V

• +0.15 V

• -0.34 V

• +0.34 V

How can standard electrode potentials be used to predict the direction of electron flow in a cell?

• Electrons flow from the half-reaction with lower E° to the half-reaction with higher E°.

• Electrons do not flow in electrochemical cells.

• Electrons flow from the half-reaction with higher E° to the half-reaction with lower E°.

• Electrons flow from the anode to the cathode regardless of E° values.