Topic:electro chemistry

Question

Tollen's reagent is used for the detection of aldehydes. When a solution of AgNO3 is added to glucose with NH4O3 then gluconic acid is formed. When ammonia is added to the solution, pH is raised to 11.  Which half-cell reaction is affected by pH and by how much?  (a) Eoxi will increase by a factor of 0.65 from E°oxi  (b) Eoxi will decrease by a factor of 0.65 from ,E°oxi  (c) Ered will increase by a factor of 0.65 from E°red  (d) Ered will decrease by a factor of 0.65 from E°red

Answer 1

Answer: E_red will increase by a factor of 0.65 from E°_red

On increasing concentration of NH₃, the concentration of H⁺ ion decreases, therefore,