Conductance of solutions

Conductance of solutions



In this experiment we shall be concerned with electrical conduction through aqueous solutions. Although water is itself a very poor conductor of electricity ,the presence of ionic species in solution increases the conductance considerably .The conductance of such electrolytic solutions depends on the concentration of the ions and also on the nature of the ions present(through their charges and mobilities),and conductance behauvior as a function of concentration is different for strong and weak electrolytes .Both strong and weak electrolytes will studied at a number of dilute concentrations ,and the ionization constant for weak electrolyte can be calculated from the data obtained.
Detection of the end-point in oxidation-Reduction Titration:

An internal oxidation-reduction indicators ,that employed to mark the sudden change in PH during acid-base titrations .Similarly an oxidation-reduction .Indicator should mark the sudden change in the oxidation potential in the neighbourhood of the equivalence point in an oxidation-reduction titration ,The ideal oxidation-reduction indicator will be one with an oxidation potential intermediate between that of the solution titrated and that of the titrant ,and which exhibits a sharp, readily detectable colour change.