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A 0.01 molal solution of ammonia freezes...

`A 0.01` molal solution of ammonia freezes at `-0.02^(@)C`. Calculate the van't Hoff factor, `i` and the percentage dissociation of ammonia in water. `(K_(f(H_(2O))))=1.86` deg `"molal"^(-1)`.

Text Solution

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The correct Answer is:
`1.075, 7.5`.
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Knowledge Check

  • A 0.5% aqueous solution of KCl was found to freeze at -0.24^(@)C . Calculate the Van,t Hoff factor and degree of dissociation of the solute at this concentration. ( K_(f) for water = 1.86 K kg mol ^(-1) )

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    B
    0.92 and 92%
    C
    1.92 and 92%
    D
    9.2 and 9.2%

  • The Van't Hoff factor i for a 0.2 molal aqueous solution of urea is

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    B
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    D
    `1.0`

  • The Van't Hoff factor i for a 0.2 molal aqueous solution of urea is

    A
    `0.2`
    B
    `0.1`
    C
    `1.2`
    D
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