The measurement of electrode potential involves establishing a galvanic cell where the electrode of interest is connected electrolytically to a standard hydrogen electrode (SHE), which has an arbitrarily assigned potential of zero. The two electrodes are separated by a porous partition or a salt bridge containing a concentrated potassium chloride solution, allowing for a highly conductive path between the electrolytic solutions. A voltmeter is used to measure the potential difference, providing the electrode potential of the concerned electrode relative to the SHE
What is the standard reference electrode used for measuring electrode potential?
The standard reference electrode used for measuring electrode potential is the standard hydrogen electrode (SHE)
What is the potential of the standard hydrogen electrode arbitrarily set to?
The potential of the standard hydrogen electrode is arbitrarily set to 0.00 volts
What is the standard electrode potential of copper when measured against the SHE?
The standard electrode potential of copper is 0.34 volts
What happens to the potential of an electrode when it is coupled with the SHE?
The potential of an electrode is measured relative to the standard hydrogen electrode (SHE) when it is coupled with it
What factors can affect the values of standard electrode potentials?
Changes in temperature, concentration, and pressure can affect the values of standard electrode potentials
What is the standard reference electrode used for measuring electrode potential?
a) Silver-silver chloride electrode
b) Calomel electrode
c) Standard hydrogen electrode (SHE)
d) Copper-copper sulfate electrode
Answer: d) Copper-copper sulfate electrode
What is the potential of the standard hydrogen electrode arbitrarily set to?
a) 1 volt
b) 0.76 volts
c) 0.34 volts
d) 0.00 volts
Answer: d) 0.00 volts
What separates the two solutions in a galvanic cell during the measurement of electrode potential?
a) A glass rod
b) A salt bridge
c) A metal wire
d) A rubber stopper
Answer: b) A salt bridge
What device is used to measure the potential difference in a galvanic cell?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Multimeter
Answer: b) Voltmeter
What happens to the potential of an electrode when it is coupled with the SHE?
a) It becomes negative
b) It is measured relative to the SHE
c) It is always zero
d) It cannot be measured
Answer: b) It is measured relative to the SHE