Question

Which one of the following salt will have the same value of vant Hoff's factor (i) as that of $K_4[Fe(CN)_6]$ ?

• A. $Al_2(SO_4)_3$
• B. NaCl
• C. $Al(NO_3)_3$
• D. $Na_2SO_4.$

Answer 1

Answer: (A)

$Al_2(SO_4)_3$

Answer 2

${ Al_2(SO_4)_3 -> 2Al^{3+} + 3SO^{2-}_{4}} ,i = 5$
${K_4[Fe(CN)_6] -> 4K^+ [Fe(CN)_6]^{4-} ,} i = 5$
${NaCl - > Na^+ + Cl^-,} i = 2$
${Al(NO_3)_3 -> Al^{3+} + 3NO^- _3,} i = 4$
${ Na_2 SO_4 - > 2Na^+ + SO_4^{2-} } i = 3$