Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Redox Reactions
0 votes

$AgNO_3(aq)\;\overset{\overset{electrolysis}{\Large\rightarrow}}{in\;presence\;of\;pt\;electrode}$ then at end of electrolysis

$\begin{array}{1 1}(a)\;P^H\uparrow\\(b)\;P^H\downarrow\\(c)\;P^H\;constant\\(d)\;None\end{array}$

Can you answer this question?

1 Answer

0 votes
Electrolysis of $AgNO_3$(aq)
$AgNO_3(aq)\rightarrow Ag^+(aq)+NO_3^-+H_2O$
$O$-anode and cathode
At cathode
$Ag^++e^-\rightarrow Ag\quad E_1^o$
$H_2O+e^-\rightarrow \large\frac{1}{2}$$H_2+OH^-\quad E_2^o$
$E_1^o > E_2^o$
At anode
$NO_3^-\overset\rightarrow\ {Oxidation}$
$H_2O\rightarrow \large\frac{1}{2}$$O_2+2H^++2e$
So $2Ag^++H_2O\rightarrow 2Ag+2H^++\large\frac{1}{2}$$O_2$
Since concentration of $H^+$ increases .So $P^H\downarrow$
Hence (b) is the correct answer.
answered Dec 12, 2013 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App