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Q.

What is the mass ration of ethylene glycol C2H6O2 molar mass = 62 g/mol) required for making 500 g for 0.25 molal aqueous solution and 250 ml of 0.25 molal aqueous solution?

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a

3:1

b

1:2

c

1:1

d

2:1

answer is B.

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Detailed Solution

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m1m2=n1/w1n2/w2⇒0.250.25=n1n2×250500n1n2=21=( mass of solute )1( mass of solute )2

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