Consider the following electrochemical cell at standard condition. Au(s)|QH₂,Q|NH₄X(0.01 M)||Ag⁺(1 M)|Ag(s)...

Question

Consider the following electrochemical cell at standard condition. Au(s)|QH₂,Q|NH₄X(0.01 M)||Ag⁺(1 M)|Ag(s) Ecell = + 0.4 V The couple QH₂/Q represents quinhydrone electrode, the half cell reaction is given below : [ Given : E^ _ Ag^+/Ag = +0.8V and 2.303RT F =0.06V ] The pKb value of the ammonium halide salt (NH₄X) used here is ______. (nearest integer)

Accepted Answer

6

JEE Main 2025 Chemistry question

Solution