Assuming salts to be 90 % dissociated, which of the following will have highest osmotic pressure?

Question

Assuming salts to be 90 % dissociated, which of the following will have highest osmotic pressure? (A) Decimolar Al 2( SO 4)3 (B) Decimolar BaCl 2 (C) Decimolar Na 2 SO 4 (D) A solution obtained by mixing equal volumes of (2) &(3) and filtering

Tardigrade Admin · Accepted Answer

π= i ( CRT ) For same C, and T=(π propto i) (1) Al 2( SO 4)3 longrightarrow underseti = 52 Al 3++3( SO 42-) (2) BaCl 2 longrightarrow underseti = 3Ba 2++2 Cl - (3) Na 2 SO 4 longrightarrow underseti = 32 Na++ SO 42- (1) have maximum (i) so its π highest

Q. Assuming salts to be $90%$ dissociated, which of the following will have highest osmotic pressure?

Decimolar $A l_{2} (S O_{4})_{3}$

Decimolar $B a C l_{2}$

Decimolar $N a_{2} S O_{4}$

A solution obtained by mixing equal volumes of (2) &(3) and filtering

$π = i (CRT)$
For same $C$ , and $T = (π \propto i)$
(1) $A l_{2} (S O_{4})_{3} ⟶ i = 5 2 A l^{3 +} + 3 (S O_{4}^{2 -})$
(2) $B a C l_{2} ⟶ i = 3 B a^{2 +} + 2 C l^{-}$
(3) $N a_{2} S O_{4} ⟶ i = 3 2 N a^{+} + S O_{4}^{2 -}$
(1) have maximum (i) so its $π$ highest

Q. Assuming salts to be 90% dissociated, which of the following will have highest osmotic pressure?

Decimolar Al2​(SO4​)3​

Decimolar BaCl2​

Decimolar Na2​SO4​