Van’t Hoff factor for a dilute solution of sodium argento cyanide is:

2 0.25 3.0 0.50

2

The compound is sodium argento cyanide, i.e., \(Na[Ag(CN)_2]\). The dissociation reaction is, \(Na[Ag(CN)_2]\) ⇌ \(Na^+\) + \([Ag(CN)_2]^−\) \(1\)   0   0 \(1 − \alpha\)   \(\alpha \)   \(\alpha \) van't Hoff factor, \(i =1 + \alpha\) For very dilute solution, \(\alpha = 1\) Hence \(i = 1 + 1 = 2\)