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Chapter 16: Problem 14

The effect that trends to retard the mobilities of ions in solution is (a) asymmetry effect (b) relaxation effect (c) electrophoretic effect (d) all of these

Short Answer

Expert verified
(d) all of these

Step by step solution

01

Understanding Ion Mobility

Ion mobility is the speed at which an ion moves in a field of force. Various factors can retard (i.e., slow down) this mobility, including the asymmetric nature of molecules, the relaxation effect, and the electrophoretic effect.
02

Analyzing the Effects

The asymmetry effect, the relaxation effect, and the electrophoretic effect, all are distinct phenomena that are known to retard ion mobility. The asymmetry effect retards ion mobility by disrupting uniform movement. The relaxation effect slows ion movement as it describes the time taken for ions to reach equilibrium in a solution after a force is applied. The electrophoretic effect refers to the motion of charged particles under influence of an electric field, which can also inhibit ion mobility due to interactions among charged particles.
03

Choosing the Answer

Given that all three effects can retard ion mobility, the correct answer is that all of these effects (asymmetry, relaxation, and electrophoretic) can retard the mobilities of ions in solution.

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Most popular questions from this chapter

Kohlrasch's law can be expressed as (a) \(\lambda_{\infty}=\lambda_{a}-\lambda_{c}\) (b) \(\lambda_{\infty}=\lambda_{c}-\lambda_{a}\) (c) \(\lambda_{\infty}=\lambda_{a}+\lambda_{c}\) (d) \(\lambda_{\infty}=\lambda_{c}+\lambda_{a}\)

The failure of Ostwald's dilution law in case of strong electrolytes is due to (a) strong electrolytes are almost completely dissociated at all dilutions and \(\lambda_{v} / \lambda_{\infty}\) do not give accurate value of \(a\) (b) the law of mass action in its simple form cannot be applied when the concentration of the ions is very high (c) the ions get hydrolysed and affect the concentration terms (d) all of the above

Kohlrausch's law can be used to determine (a) \(\lambda_{\infty}\) for weak electrolyte (b) absolute ionic mobilities (c) solubility of a sparingly soluble salt (d) all of these

Which of the following postulatales of Debye-Huckel theory is/are true? (a) The strong electrolyte is completely ionised at all dilutions. (b) The oppositely changed ions are completely distributed in the solution but the cations tend to be found in the vicinity of anions and vice versa. (c) Decrease in equivalent conductance with increase in concentration is due to fall in mobilities of ions due to inter-ionic effect. (d) All of the above.

If \(\lambda_{\infty}\) and \(\lambda_{v}\) are the equivalent conductances at infinite dilution and at \(V\) dilution, the degree of dissociation, \(\alpha\) is given by (a) \(\alpha=\frac{\lambda_{\infty}}{\lambda_{v}}\) (b) \(\alpha=\frac{\lambda_{c 0}}{\lambda_{v}^{2}}\) (c) \(\alpha=\frac{\lambda_{v}}{\lambda_{\mathrm{cos}}}\) (d) None of these
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