IGNOU MCH 4 2017 - A solution of Zn is electrolysed for 30 s using a current if 1.0 mA. C

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 ï‚® Zn

08 Mar 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

$\Rightarrow$

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