JEE Main202127 Aug 2021Morning ShiftChemistryChemical EquilibriumActual
The number of moles of NH 3 , that must be added to 2 L of 0 . 80 MAgNO 3 in order to reduce the concentration of Ag + ions to 5 . 0 × 10 - 8 M K formation for Ag NH 3 2 + = 1 . 0 × 10 8 is __________. (Nearest integer) [Assume no volume change on adding NH 3 ]
Correct answer
0
Step-by-step solution
Let no. moles of NH 3 added = x Ag + ( aq ) + 2 NH 3 ( aq ) ⇌ Ag NH 3 2 + ( aq ) t = 0 0 . 8 x 2 t = ∞ 5 × 10 - 8 x 2 - 1 . 6 0 . 8 K eq = Ag NH 3 2 + Ag + NH 3 2 x 2 - 1 . 6 = 0 . 4 x = 4