JEE PYQ: Solutions And Colligative Properties Question 31
Question 31 - 2019 (09 Apr Shift 2)
What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI $= 166$ g mol$^{-1}$)
(1). (1.08)
(2). (1.35)
(3). (1.48)
(4). (1.51)
Show Answer
Answer: (4)
Solution
20 g KI in 80 g water. Molality $= \frac{0.121 \times 1000}{80} = 1.51$ m.