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3. Electrochemistry
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Q7 of 33 Page 83

Why does the conductivity of a solution decrease with dilution?

The conductivity of a solution depends on the amount of ions present per volume of the solution. When diluted, the concentration of the ions decreases which implies that the number of ions per volume decreases thus, in turn, conductivity decreases.


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5

Calculate the emf of the cell in which the following reaction takes place:

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The Cell in which the following reaction occurs:

2Fe3+(aq) + 2I– (aq) → 2Fe2+(aq) + I2(s) has E0cell = 0.236V at 298 K.


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8

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9

The molar conductivity of 0.025 mol L–1 methanoic acid is 46.1 S cm2 mol–1. Calculate its degree of dissociation and dissociation constant. Given λ0(H+) = 349.6 S cm2 mol–1 and λ0 (HCOO–) = 54.6 S cm2 mol–1.

Questions · 33
3. Electrochemistry
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