Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is : (A) 2 m (B) 3 m (C) 1.79 m (D) 2.79 m

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Question

Density of 3 M NaCl solution is 1.25 g/mL. The molality of the solution is :

(A) 2 m
(B) 3 m
(C) 1.79 m
(D) 2.79 m

Prashant Kotian · Accepted Answer

Correct answer: D.       Mass . aq mol m M d solute or 1.25 = 3     1000 . m or m = 2.79 m

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