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The resistance of a N//10 KCI solution i...

The resistance of a `N//10 KCI` solution is 245 ohms. Calculate the specific conductance and the equivalent conductance of the solution if the electrodes in the cell are 4 cm apart and each having an area of 7.0 sq cm.

Text Solution

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Cell constant `= (1)/(a) = (4)/(7) cm^(-1)`.
Specific conductance = conductance `xx` cell constant
`= (1)/("resistance") xx (l)/(a)`
`= (1)/(245) xx (4)/(7) = 2.332 xx 10^(-3) "mho cm"^(-1)`
Equivalent conductance = sp. Cond. `xx` volume (cc) (containing 1 eq. of the substance)
`= 2.332 xx 10^(-3) xx 10000` (for N/10 solution, v = 10,000 cc)
`= 23.32 "mho cm"^(2)`.
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