Define and write the units of the following terminologies: (i) Specific conductivity (ii) equivalent…

Question

Define and write the units of the following terminologies: (i) Specific conductivity (ii) equivalent conductance (iii) molar conductance.

ScanSolve AI Tutor · Accepted Answer

To determine the current strength required, we first need to calculate the total charge needed to liberate 10g of iodine.

Write the half-reaction for the liberation of iodine.
Iodide ions ( $I^-$ ) are oxidized to iodine ( $I_2$ ) at the anode.
$2I^{-} \to I_2 + 2e^{-}$
Calculate the molar mass of $I_2$ and the moles of $I_2$ to be liberated.
Given atomic weight of iodine = $127 \text{ g/mol}$ .
Molar mass of $I_2 = 2 \times 127 \text{ g/mol} = 254 \text{ g/mol}$ .
Mass of $I_2$ to be liberated = $10 \text{ g}$ .
$\text{Moles of } I_2 = \frac{\text{mass}}{\text{molar mass}} = \frac{10 \text{ g}}{254 \text{ g/mol}} \approx 0.03937 \text{ mol}$
Determine the moles of electrons required.
From the half-reaction, 1 mole of $I_2$ requires 2 moles of electrons.
$\text{Moles of electrons} = 2 \times \text{moles of } I_2 = 2 \times 0.03937 \text{ mol} \approx 0.07874 \text{ mol}$
Calculate the total charge (Q) required.
Given Faraday's constant = $96,500 \text{ C/mol}$ .
$Q = \text{moles of electrons} \times \text{Faraday's constant}$ $Q = 0.07874 \text{ mol} \times 96,500 \text{ C/mol} \approx 7600.8 \text{ C}$
The total charge required to liberate $10 \text{ g}$ of iodine is $\boxed{7600.8 \text{ C}}$ .
Determine the current strength in amperes.
Current ( $I$ ) is defined as charge ( $Q$ ) per unit time ( $t$ ): $I = \frac{Q}{t}$ .
Since the time ( $t$ ) over which the liberation occurs is not provided in the question, the current strength in amperes cannot be uniquely determined. To calculate the current, a specific time duration must be given.

Define and write the units of the following terminologies: (i) Specific conductivity (ii) equivalent conductance (iii) molar conductance.