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in Chemistry by (121k points)
Tollen reagent is used for the detection of aldehydes. When a solution of `AgNO_(3)` is added to glucose with `NH_(4)OH`, then gluconic acid is formed.
`Ag^(o+)+e^(-) rarr Ag," "E^(c-)._(red)=0.8V`
`C_(6)H_(12)O_(6)rarr underset(Gluconic aci d)(C_(6)H_(12)O_(7)+)2H^(o+)+2e^(-) , " "E^(c-)._(o x i d ) =-0.05V`
`[Ag(NH_(3))_(2)]^(o+)+e^(-) rarr Ag(s)+2NH_(3), " "E^(c-)._(red)=0.337V`
`[Use2.303xx(RT)/(F)=0.0592` and `(F)/(RT)=38.92at 298 K ]`
Ammonia is always added in this reaction. Which of the followijng must be wrong ?
A. `[Ag(NH_(3))_(2)]^(+)` is a weaker oxidizing agent than `Ag^(+)`
B. to dissolve the insoluble silver oxide formed under the reaction condictions
C. Ag precipiates gluconic acid as its silver salt
D. `NH_(3)` changes the standard reduction potential of `[Ag(NH_(3))_(2)]^(+)`

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1 Answer

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Correct Answer - B

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