The standard electrode potential is measured bya)Galvanometerb)Voltmeterc)Electrometerd)PyrometerCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

There is a major difference between the charge on the two electrodes - a potential difference which can be measured with a voltmeter. The voltage measured would be 2.37 volts and the voltmeter would show the magnesium as the negative electrode and the hydrogen electrode as being positive.

Answer

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit.

Answer

Standard Electrode Potential

The standard electrode potential, also known as the standard reduction potential, is a measure of the tendency of an electrode to gain electrons. It is defined as the potential difference between the electrode and the standard hydrogen electrode (SHE) under standard conditions. The standard electrode potential is a crucial parameter in electrochemistry as it helps in predicting the feasibility and direction of redox reactions.

Measurement of Standard Electrode Potential

The standard electrode potential is measured using a voltmeter. A voltmeter is an instrument that is used to measure the potential difference between two points in an electrical circuit. In the context of measuring the standard electrode potential, the voltmeter is used to measure the potential difference between the electrode being studied and the reference electrode, which is the standard hydrogen electrode.

Why a Voltmeter is Used

A voltmeter is used for measuring the standard electrode potential because it is specifically designed to measure potential differences accurately. It is connected in parallel to the electrodes being studied, allowing it to measure the voltage between them. The voltmeter is calibrated to give readings in volts, which is the unit of potential difference.

Other Options

- Galvanometer: A galvanometer is an instrument used to detect and measure small electric currents. It is not suitable for measuring potential differences directly.

- Electrometer: An electrometer is an instrument used to measure very small electric potentials or potential differences. While it can measure potential differences accurately, it is not commonly used for measuring the standard electrode potential.

- Pyrometer: A pyrometer is an instrument used to measure high temperatures, typically using infrared radiation. It is not designed for measuring potential differences and is not suitable for measuring the standard electrode potential.

Conclusion

In conclusion, the standard electrode potential is measured using a voltmeter. A voltmeter is specifically designed to measure potential differences accurately and is connected in parallel to the electrodes being studied. It allows for the measurement of the potential difference between the electrode being studied and the reference electrode, which is the standard hydrogen electrode.

Top Courses for Class 12View all

English Class 12

Chemistry Class 12

Physics Class 12

English Flamingo Class 12

Crash Course for Commerce

Top Courses for Class 12

Top Courses for Class 12

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams