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What would be the molality of 20 (mass/mass) aqueous solution of Kl? (molar mass of Kl=166 g

(a)

1.48

(b)

1.51

(c)

1.08

(d)

1.35

Question ID - 52621 :-

What would be the molality of 20 (mass/mass) aqueous solution of Kl? (molar mass of Kl=166 g

(a)

1.48

(b)

1.51

(c)

1.08

(d)

1.35

1 Answer
5876 Votes
3537
Answer Key : (b) -

20% W/W KI solution

i.e.  100 g solution contains 20 g KI

∴  Mass of solvent =100−20=80 g

∴  Molality=

                     =1.51 molar


Next Question :

A man turns on a rotating table with an angular speed . He is holding two equal masses at arm’s length. Without moving his arms, he just drops the two masses. How will his angular speed change

a)

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b)

It will be more than

c)

It will remain equal to

d)

May be less than, greater than or equal to  depending on the quantity of masses

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