One Faraday, in terms of electrochemistry, is defined as the charge of one mole of electrons. This is calculated using the charge of a single electron and Avogadro's number.
The charge of one electron is approximately \(1.602 \times 10^{-19}\) Coulombs. Avogadro's number, which is the number of atoms or molecules in one mole, is approximately \(6.022 \times 10^{23}\).
The numerical value of one Faraday is the product of these two constants:
Faraday = Charge of one electron × Avogadro's number
Faraday = \(1.602 \times 10^{-19} \) C × \(6.022 \times 10^{23}\)
This calculation yields approximately 96587 Coulombs.
Therefore, the correct answer is: 96587
One Faraday is the amount of electric charge carried by one mole of electrons.
The numerical value of one Faraday in Coulombs is approximately 96,587 C/mol.
This value represents the Faraday constant, which is used in electrochemistry to relate the amount of charge to the amount of substance in a chemical reaction.
Thus, the correct numerical value of one Faraday is 96,587 Coulombs (Option A).
Standard electrode potential for \( \text{Sn}^{4+}/\text{Sn}^{2+} \) couple is +0.15 V and that for the \( \text{Cr}^{3+}/\text{Cr} \) couple is -0.74 V. The two couples in their standard states are connected to make a cell. The cell potential will be:
To calculate the cell potential (\( E^\circ_{\text{cell}} \)), we use the standard electrode potentials of the given redox couples.
Given data:
\( E^\circ_{\text{Sn}^{4+}/\text{Sn}^{2+}} = +0.15V \)
\( E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74V \)
Three friends, P, Q, and R, are solving a puzzle with statements:
(i) If P is a knight, Q is a knave.
(ii) If Q is a knight, R is a spy.
(iii) If R is a knight, P is a knave. Knights always tell the truth, knaves always lie, and spies sometimes tell the truth. If each friend is either a knight, knave, or spy, who is the knight?