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A solution offers a resistance of to a conductivity cell at . If the cell constant is and the molar…
(i)[3.0]
A $0\cdot06\text{ molar}$ $\text{CH}_3\text{COOH}$ solution offers a resistance of $55\text{ ohms}$ to a conductivity cell at $25^\circ\text{C}$. If the cell constant is $0\cdot45\text{ cm}^{-1}$ and the molar conductance of $\text{CH}_3\text{COOH}$ at infinite dilution is $398\cdot5\text{ ohm}^{-1}\text{cm}^2\text{mol}^{-1}$. Calculate:
(a) Specific conductance
(b) Molar conductance
(c) Degree of dissociation
(ii)[2.0]
Calculate the number of coulombs of charge required to deposit $24\cdot35\text{ g}$ of aluminium from a solution containing $\text{Al}^{3+}$ ions.
(Atomic weight of $\text{Al} = 27$)
Answer
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From ISC 2023 Specimen Chemistry Paper 1, question 21(i).