Of the following four aqueous solutions, the total number of those solutions whose freezing point is lower than that of 0 . 10 MC 2 H 5 OH is (Integer answer) (i) 0 . 10 M Ba 3 PO 4 2 (ii) 0 . 10 M Na 2 SO 4 (iii) 0 . 10 M KCl (iv) 0 . 10 M Li 3 PO 4

Question

Of the following four aqueous solutions, the total number of those solutions whose freezing point is lower than that of 0 . 10 MC 2 H 5 OH is (Integer answer) (i) 0 . 10 M Ba 3 PO 4 2 (ii) 0 . 10 M Na 2 SO 4 (iii) 0 . 10 M KCl (iv) 0 . 10 M Li 3 PO 4,

MARKS App · Accepted Answer

ΔT f = ik f m As m is the same for all solutions so ΔT f depends on Van't Hoff factor (i). Greater is i small is freezing point. Compound i C 2 H 5 OH 1 Ba 3 PO 4 2 5 Na 2 SO 4 3 KCl 2 Li 3 PO 4 4 So the given solutions have a lower freezing point than ethanol.

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