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Chapter 16: Problem 3

On passing electrical current through an electrolyte solution, the cations (a) move towards cathode with speed equal to that of anions towards anode (b) move with faster speed than that of anions (c) move with different speed as compared to that of anions (d) move with slower speed than that of anions

Short Answer

Expert verified
The correct answer is (c) cations move with different speed as compared to that of anions.

Step by step solution

01

Understanding Electrolysis

During electrolysis, an electrical current is passed through an electrolyte (a conducting liquid). This electric current splits the electrolyte's molecules into ions. Positively charged ions (cations) migrate towards the negatively charged electrode (cathode), while negatively charged ions (anions) migrate towards the positive electrode (anode).
02

Consider the Speed of Ion Movements

The speed of the ions' movement depends upon their individual ionic mobility, which means the ability of the ion to move in an applied electric field. This ionic mobility is influenced by factors like the size, charge, and shape of the ions. However, there's no rule stating that the cations must move faster or slower than the anions.
03

Select the Right Option

Considering the principles of electrolysis and the fact that ionic mobility (and therefore speed) can differ between different ions, the right answer is (c) cations move with different speed as compared to that of anions. This means that depending on the specifics of the ions involved, cations may move faster, slower or at an equal pace to anions.

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Most popular questions from this chapter

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

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

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

The Hittorf's rule states that (a) the loss of concentration around any electrode is proportional to the speed of the ions moving towards it (b) the loss of concentration around any electrode is proportional to the speed of the ions moving away from it (c) the loss of concentrations around both the electrodes is proportional to the sum of speed of cations and anions (d) none of the above

The equivalent conductance at infinite dilution of \(\mathrm{NaCl}\), \(\mathrm{HCl}\) and \(\mathrm{CH}_{3} \mathrm{COONa}\) at \(25^{\circ} \mathrm{C}\) are \(126.0\), \(426.0\) and \(91.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2}\) respectively. The equivalent conductance of acetic acid at infinite dilution at \(25^{\circ} \mathrm{C}\) will be (a) \(643.0\) (b) \(517.0\) (c) \(217.0\) (d) \(391.0\)
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