Which of the following salt has the same value of vant’s Hoff factor as that of K 3[ Fe ( CN )6] ?

Question

Which of the following salt has the same value of vant’s Hoff factor as that of K 3[ Fe ( CN )6] ? (A) Na 2 SO 4 (B) Al ( NO 3)3 (C) Al 2( SO 4)3 (D) Fe 3 O 4

Tardigrade Admin · Accepted Answer

K 3[( FeCN )6] on ionisation gives 4 species (3 K +. and .1[ Fe ( CN )6]3-) and Al ( NO 3)3 also gives 4 species (1 Al 3+. and .3 NO 3-), thus both will have same value of Van't Hoff factor.

Q. Which of the following salt has the same value of vant’s Hoff factor as that of $K_{3} [F e (CN)_{6}]$ ?

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

$A l (N O_{3})_{3}$

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

$F e_{3} O_{4}$

$K_{3} [(F e CN)_{6}]$ on ionisation gives 4 species $(3 K^{+}$ and $1 [F e (CN)_{6}]^{3 -})$ and $A l (N O_{3})_{3}$ also gives 4 species $(1 A l^{3 +}$ and $3 N O_{3}^{-})$ , thus both will have same value of Van't Hoff factor.

Q. Which of the following salt has the same value of vant’s Hoff factor as that of K3​[Fe(CN)6​] ?

Na2​SO4​

Al(NO3​)3​

Al2​(SO4​)3​

Fe3​O4​