What is cell constant? What are its units?

Answer:

The quantity l/A is called cell constant denoted by the symbol, G*.
It depends on the distance between the electrodes and their area of cross-section and has the dimension of length–1 and can be calculated
if we know l and A.

 Its unit are cm–1 ohm–1.
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Which equation give the relationship between equivalent or molar conductance and concentration of a strong electrolytes?

Debye – Huckel – Onsager equation.

Λm = Λm0- bc.whereΛm = molar conductance at vert dilute dilutionΛm0 = Molar conductance at infinte dilution
b = it is constant which depend upon nature of solvent and temperature .
c= concentration
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Express mathematically the relationship among the resistance (R), specific conductivity and cell constant.

Answer:

Specific conductivity = Cell constantResistance.

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What is the effect of dilution on equivalent conductance of solution?

Answer

Equivalent conductance increase with dilution. Increases with dilution and finally attains a limiting value of infinite dilution.
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Name any two metals. Which can be used for cathodic protection of iron?


Answer:

Zinc and aluminium are used for as cathodic protection of iron.
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