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What is strong electrolyte ? Explain relation between molar conductivity and concentration of solution with strong electrolyte. |
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Answer» Solution :* (a) Strong electrolyte : Electrolytes which gives maximum ionization in its aqueous solution are known as strong electrolyte. * Conductivity of solution having strong electrolyte is more. For e.g. KCL, NaCl, `KNO_(3), NaNO_(3),MgCl_(2),CaCl_(2),MgSO_(4)` etc. Salts of strong ACID and base are strong electrolyte. * (b) Concentration of solution and value of `Lamda_(m)`: for strong electrolytes, `Lamda_(m)` increases slowly with dilution and can be REPRESENTED by the equation. `Lamda_(m)=Lamda_(m)^(@)-A c^(1//2)` Where, `Lamda_(m)=`molar conductivity of strong electrolyte. `Lamda_(m)^(@)`=LIMITING molar conductivity of strong electrolyte. `Lamda_(m)^(@)`=limiting molar conductivity of strong electrolyte. c=molar conductivity of solution in mol `L^(-1)`  * Where, A=constant=negative slope of graph.  * Value of A depends on : (i) type of electrolyte (+ve and -ve IONS) like 1-1, 1-1, 2-1, 2-2 etc. (ii) temperature and (iii) pressure. * Value of `Lamda_(m)` is same for same type of all electrolyte. |
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