sapling learning For the following liquid junctions, determine which side of the

Question

sapling learning For the following liquid junctions, determine which side of the junction will be positive Ion Mobility (m los. A. 0.1 M NaCl l 0.1 M KCI K+ 7.62x10-8 left side will be positive O right side will be positive Nat 5.19x10-8 B. 0.1 M KCI l 0.1 M KI O left side will be positive O right side will be positive C. 0.1 M NaNO, 0.1 M KI left side will be positive right side will be positive Previous Give Up & View Solution Check Answer Next Exit Hint Examine the relative mobilities of the anions and cations for each junction potential. The cation with the greater mobility will diffuse more rapidly across the junction, depleting its charge on its original side. The same applies to the anions

Explanation / Answer

A. K+ has higher mobility than Na+ and migrate to left side. Answer: Left side will positive.

B. I- has higher mobility than Cl- and migrate to left side. Answer: Right side will be positive.

C: All mobilities are in the same order of magnitude. The most relevant difference in mobility (producing a higher depletion) is for cations: K+ has higher mobility than Na+ and migrate to left side. The cation depletion is higher than anion depletion (of opposite sign). Answer: Left side will be positive.

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