Explanation

(a) If the same quantity of electricity is passed through different  voltameters/electrolytes connected in series the masses of the substances liberated/deposited during electrolysis is (directly) proportional to their chemical equivalents.                                                                                        

OR The mass of an element deposited/liberated during electrolysis is (directly) proportional to the chemical equivalent of the element.

(b)        Let e represent the electronic charge.
                       
                        e  =   Faraday’s constant
                                 Avogadro’s number                                                                              

                        =          9.6 x 10\(^4\)                                                                                                                           
                                    6. 0. x 10\(^{23}\)

=  1.60 x 10\(^{-19}\)C                                 

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