Question

9. What would be the molality of 20% (mass/mass aqueous solution of KI ? (Molar mass of KI = 166 g mol-') (a) 148 (b)1.51 (c) 135 (d) 1.08​

Answer 1

Answer:

Molality of 20% aqueous solution is 1.51.

Explanation:

20% w/w K. l.

20 gm K. l. is 100 gm solution

Molality = gm(solute)

mw × kg (solvent)

= 20 × 1000

166 × 80

= 1.506

= 1.51