1. Write unit of cell constant.
2. Explain the process to calibrate conductivity meter.
3. State formula for conversion of specific conductance to equivalent conductance.
Answers
Explanation:
1) Unit of cell Unit of cell constant is cm -1 or m -1 . ... Molar Conductivity (Λ m ) The conductivity of all the ions produced when 1 mole of an electrolyte is dissolved in V mL of solution is known as molar conductivity. It is related to specific conductance as Λ m = (k x 1000/M) where.
2) The meter passes an alternating current between electrodes and measures the potential between the inner pair. By using the known distance between electrodes and Ohm's law, the meter then computes the conductivity of the solution being tested. Some meters use inductive-coupled coils instead of four electrodes.
3) As we have considered a solution containing 1 gm-equivalent. Thus, Equivalent Conductance(Λ)= Equivalent Conductivity(k)*1000/Normality. 1000 is multiplied as Equivalent Conductance is defined for volume in cm^3 while Normality is defined for volume in litres.
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