The ionization of an acid in water measures the relative strength of the acid. CBSE XII Science Chemistry Electrochemistry The equivalent conductance of a decimolar solution of acetic acid was found to be 1.58*10^-3Sm^2eq^-1 at a given temperature. k 2) To calculate degree of dissociation of weak electrolytes \(\alpha=\frac{\Lambda_{m}}{\Lambda_{m}^{0}}\) 3) To determine the dissociation constant of weak electrolytes. Calculate the degree of dissociation of acetic acid. What will be the degree of ionization of N/1000 acetic acid solution if its equivalent conductance is 50mhos and the value of equivalent conductance at infinite dilution is 350mhos. Do Not Sell My Info - CA Resident Only, Equilibrium Concept in Analytical Chemistry, Laboratory Experiments in Analytical Chemistry. Science > Chemistry > Electrochemistry > Ionic Conduction. E.g. Let x moles of NH3dissociate at equilibrium. 2. Degree of dissociation (a) of NH3is defined as the number of moles of NH3 dissociated per mole of NH3. Tutorial sheet-II Electrochemistry (Degree of Dissociation) 1. The degree of dissociation of a substance is defined as the fraction of its molecules dissociating at a given time. Let us consider the reaction, 2NH3 (g) N2 (g) + 3H2(g) Let the initial moles of NH3(g) be ‘a’. Electrochemistry is concerned with the study of the mutual inter-conversion of chemical and electrical energies. The electrolytes undergo dissociation to furnish ions either in molten state or in aqueous solutions. The K a is simply the equilibrium constant for the ionization of an acid HA into H + and A - .It can be written that K a [H +][A - ]/[HA].Considering the degree of dissociation to be α we can easily establish the formula involving α , C (=concentration of the solution) and K a , which is written above. Determination of degree of dissociation (α) of an electrolyte at a given dilution. Bigger is the ionic size lesser is its conductance ... Due to an increase in dilution degree of dissociation increases and which results in an increase in the molar conductivity. A system in which electrochemical process takes place has three distinct features as illustrated in Fig. The conductance of an ion depends on its size in an aqueous medium or in the solvent. Electrolytic Cell and Electrolysis: In an electrolytic cell, external source of voltage is used to bring about a chemical reaction. if x moles dissociate from ‘a’ moles of NH3, then, the degree of dissociation of NH… 1. Depending on the extent of ionization (or dissociation) in water, the electrolytes are further divided into: a) Strong electrolytes: Undergo complete ionization in water. …