Problem 1
Write down expressions that define (a) resistivity, (b) conductivity and (c) conductance.
Problem 4
Classify solutions of the following compounds as strong or weak electrolytes: (a) \(\mathrm{AgNO}_{3}\) (b) \(\mathrm{HNO}_{3} ;(\mathrm{c}) \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CO}_{2} \mathrm{H}\) (d) \(\mathrm{K}\left[\mathrm{CH}_{3} \mathrm{CO}_{2}\right]\) (e) \(\mathrm{NH}_{4} \mathrm{Cl}\)
Problem 5
Which of the following compounds are sparingly soluble in water (a) \(\mathrm{NH}_{4} \mathrm{Br}\) (b) \(\mathrm{AgBr}\) (c) \(\mathrm{KOH}\) (d) \(\mathrm{BaSO}_{4}\) ? How does this affect conductivity measurements?
Problem 8
Explain why the molar conductivity at infinite dilution of a weak acid such as \(\mathrm{CH}_{3} \mathrm{CO}_{2} \mathrm{H}\) is high, but then decreases dramatically as the concentration is raised even slightly.
Problem 12
The ionic mobilities of \(\mathrm{K}^{+}\) and \(\left[\mathrm{MnO}_{4}\right]^{-}\) at \(298 \mathrm{K}\) are \(7.62 \times 10^{-8}\) and \(6.35 \times 10^{-8} \mathrm{m}^{2} \mathrm{s}^{-1} \mathrm{V}^{-1}\) Determine \(A_{\mathrm{m}}^{\infty}(298 \mathrm{K})\) for \(\mathrm{KMnO}_{4}\)
Problem 13
The ionic mobilities of \(\mathrm{Sr}^{2+}\) and \(\mathrm{Cl}^{-}\) at \(298 \mathrm{K}\) are \(6.16 \times 10^{-8}\) and \(7.91 \times 10^{-8} \mathrm{m}^{2} \mathrm{s}^{-1} \mathrm{V}^{-1}.\) Determine \(\Lambda_{\mathrm{m}}^{\infty}(298 \mathrm{K})\) for \(\mathrm{SrCl}_{2}.\)
