logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
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)
$AgNO_3(aq)\rightarrow Ag^+(aq)+NO_3^-+H_2O$
$Ag^+$-cathode
$NO_3^-$-anode
$O$-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
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...