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Tollen's reagent is used for the detecti...

Tollen's reagent is used for the detection of aldehyde when a solution of `AgNO_3` is added to gluose with `NH_4OH` then gluconic acid is formed
`Ag^(+) + e^(-) to ag, E_(1)^(@) = 0.8 V , C_6H_(12)O_6 + H_2O to "Gluconic acid "`
`(C_6 H_(12)O_7) + 2H^(+) + 2e^(-) , E_(2)^(@) = -0.05 V , [Ag(NH_3)_2]^(+) e^(-) to Ag(s) + 2NH_3`,
[Use , `2.303 xx (RT)/(F) = 0.0592 and (F)/(RT) = 38.92 "at " 298 K`]
When ammonia is added to the solution , pH is raised to 11 . Which is affected by pH amount by how much ?

A

`E_("oxid")` glucose will increase by a factor of `0.65V ` from `E_("oxid")^(@)`

B

`E_("oxid")` glucose will decrease by a factor of 0.65 V from `E_("oxid")^(@)`

C

`E_("red") Ag^(+)` will increase by a factor of 0.65 V from `E_("red")^(@)`

D

`E_("red") Ag^(+)` will decrease by a factor of 0.65 V from `E_("red")^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
`E_(RP) = E_(SRP) - (0.0591)/(2) log""(1)/((H^(+))^(2)) , [{:(pH =11),([H^(+)]=10^(-11)):}]`
` =E_(SRP)^(0) - (0.0591)/(2) log""(1)/((10^(-11))^(2))=E_(SRP)^(0) -(0.0591)/(2) log""10^(22) = E_(SRP)^(0) - 0.6561`
`E_(RP) = (0.05 - 0.6501) = -0.600//V , E_(OP) = + 0.6001 = (-0.05 + E_(OP))`
`E_(OP) = 0.6001 + 0.05 + 0.650 // V , "So",O.P uarr ` by 0.6501V
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