For the measurement of standard electrode potential Zn is dipped in________________?
Correct answer: B. 1 M ZnSO4 solution
- A. 1 M ZnO solution
- B. 1 M ZnSO4 solution
- C. 1.5 M ZnSO4 solution
- D. 0.1 M ZnSO4 solution
Explanation
To measure the standard electrode potential of Zn, the Zn2+ activity is taken as 1 M and zinc metal is dipped into a 1 M ZnSO4 solution. A student may choose 0.1 M ZnSO4 by treating any aqueous concentration as acceptable, but changing concentration means the electrode is no longer under standard conditions.
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About Standard Hydrogen Electrode
The standard hydrogen electrode provides the reference potential of 0.00 V for measuring electrode potentials. It consists of platinum in contact with hydrogen gas at standard pressure and hydrogen ions at standard concentration, usually at 25°C, and can operate as either the oxidation or reduction half-cell.
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