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An aqueous solution of glucose containin...

An aqueous solution of glucose containing 12 g in 100g of water was found to boil at `100.34^@C.` Calculate `K_b` for water in K mol`""^(-1)` kg.

A

`1.81`

B

`1.02`

C

`0.51`

D

`0.82`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta T_(b)= 0.34K`
molality `= (1000 xx 12)/(180 x 100) = 0.667`
`Delta T_(b)= k_(b)m`
`k_(b)= (0.34)/(0.667) = 0.51K kg mol^(-1)`
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