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Solve the following.
The resistance of a conductivity cell with solution is . When the same cell is filled with…
(a)[2.5]
The resistance of a conductivity cell with $0\cdot1\text{ M}$ $\text{KCl}$ solution is $200\text{ ohm}$. When the same cell is filled with $0\cdot02\text{ M}$ $\text{NaCl}$ solution, the resistance is $1100\text{ ohm}$. If the conductivity of $0\cdot1\text{ M}$ $\text{KCl}$ solution is $0\cdot0129\text{ ohm}^{-1}\text{ cm}^{-1}$, calculate the cell constant and molar conductivity of $0\cdot02\text{ M}$ $\text{NaCl}$ solution.
(b)[2.5]
The emf ($E^\circ_{\text{cell}}$) of the following reaction is $0\cdot89\text{ V}$:
$3\text{Sn}^{4+} + 2\text{Cr} \rightarrow 3\text{Sn}^{2+} + 2\text{Cr}^{3+}$
Calculate the value of $\Delta G^\circ$ for the reaction. Predict whether the above reaction will be spontaneous or not.
Answer
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From ISC 2023 Chemistry Paper 1, question 21(ii).
Check your working with the Chemistry numericals calculator: solutions, electrochemistry and kinetics formulas: fill in what you know and get the rest.