Question

Which one has same Van't Hoff factor ${}^{\prime }{i}^{\prime }$ as that of $H{g}_{2}C{l}_2$?

• A. $NaCl$
• B. $N{a}_{2}S{O}_4$
• C. $Al(N{O}_3{)}_3$
• D. $A{l}_2(S{O}_4{)}_3$

Answer 1

Answer: (B)

$N{a}_{2}S{O}_4$

${Hg}_2{Cl}_2\left(aq\right)\rightleftharpoons {Hg}_2^{2+}\left(aq\right)+2{Cl}^{-}\left(aq\right)$

$\Rightarrow$ There are $3$ ions.

$\therefore$ ${Na}_2{SO}_4({2Na}^{+}+{SO}_4^{2-})$ which also has $3$ ions has same Van't Hoff factor as that of ${Hg}_2{Cl}_2$.