Tollen's reagent is used for the detection fo aldehyde when a solution of AgNO_(3) is added to glucose with NH_(4)OH then gloconic acid is formed Ag^(+)toe^(-)toAg,E_(Red)^(@)=0.8V C_(6)H_(12)O_(6)+H_(2)Oto"gluconic acid"(C_(6)H_(12)O_(7)) +2H^(+)+2e^(-),E_(red)^(@)=-0.05V Ag(NH_(3))_(2)^(+)+e^(-)toAg(s)+2NH_(3),E_(red)^(@)=0.337V ["Use "2.303xx(RT)/(F)=0.0592 and (F)/(RT)=38.92" at "298K] Q. When ammonia is added to the solution, pH is raied to 11. Whichhalf-cell reaction is affected by pH and by how much

Tollen's reagent is used for the detection fo aldehyde when a solution

1.	Tollen's reagent is used for the detection fo aldehyde when a solution of AgNO_(3) is added to glucose with NH_(4)OH then gloconic acid is formed Ag^(+)toe^(-)toAg,E_(Red)^(@)=0.8V C_(6)H_(12)O_(6)+H_(2)Oto"gluconic acid"(C_(6)H_(12)O_(7)) +2H^(+)+2e^(-),E_(red)^(@)=-0.05V Ag(NH_(3))_(2)^(+)+e^(-)toAg(s)+2NH_(3),E_(red)^(@)=0.337V ["Use "2.303xx(RT)/(F)=0.0592 and (F)/(RT)=38.92" at "298K] Q. When ammonia is added to the solution, pH is raied to 11. Whichhalf-cell reaction is affected by pH and by how much
Answer» `E_("oxi")` will INCREASE by a factor of 0.65 from `E_(0" xi")^(@)` `E_(oxi)` will decrease by a factor of 0.65 from `E_("oxi")^(@)` `E_(red)` will increase by a factor of 0.65 from `E_(red)^(@)` `E_(red)` will decrease by a factor of 0.65 from `E_(red)^(@)`. Solution :On increasing concentration of `NH_(3)`, the concentration of `H^(+)` ION decreases, therefore. `E_(red)=E_(red)^(o)-(0.0592)/(n)log_(10)[H^(+)]^(2)` `=0-(0.0592)/(2)xx2log_(10)10^(-11)` `(becausepH=11,therefore[H^+]=10^(-11)M)` `=0.0592xx11=0.6512V=0.65V` `E_(red)` increased by a factor of 0.65 from `E_(red)^(o)`.