When ammonia is added to the solution, pH is raised to 1 1. Which half-cell reaction is affected by pH and by how much?

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) E_oxi will increase by a factor of 0.65 from E°oxi 

(b) E_oxi will decrease by a factor of 0.65 from ,E°_oxi 

(c) E_red will increase by a factor of 0.65 from E°_red 

(d) E_red will decrease by a factor of 0.65 from E°red

Answer 1

The correct option (c) E_red will increase by a factor of 0.65 from E°_red 

Explanation:

On increasing concentration of NH₃, the concentration of 

H⁺ ion decreases, therefore

Answer 2

Answer (c) E_red will increase by a factor of 0.65 from E°_red