Question

A solution of Zn is electrolysed for 30 s using a current if 1.0 mA. Calculate the mass of Zn plated on the electrode for the electrochemical reaction:

Zn2+ + 2e ® Zn

06 Apr 2018
Answer :
Word Count : 175

Give ,

          Z_{n} 2+ + 2e- \rightarrow Zn

             time , t = 30 s

             current , i = 1.0 mA = 10-3 A

\therefore         Change produced Q = i t

                                             = 10-3

                                             = 30 x 10-3 C

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