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100 ml of ethyl alcohol is made upto a l...

100 ml of ethyl alcohol is made upto a litre with distilled water. If the density of the ethyl alcohol is 0.46g/ml. What is the molality of the solution ?

Text Solution

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Density of ethyl alcohol = 0.46g/ml,
Vol. of ethyl alcohol 100 ml
Wt of ethyl alcohol = d x v = 0.46 x 100 = 46g
Wt.of water in the solution = 900 x 1 =900 g (`because` density of `H_2O` = 1 g/m1)
`therefore` molality = `(W/(G.M.W))_"solute" xx 1000/"wt of solvent in gms" =46/46xx1000/900`=1.11 m
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Knowledge Check

  • The solution of KOH in ethyl alcohol contains

    A
    `C_(2)H_(4)`
    B
    `C_(2)H_(6)`
    C
    `C_(2)H_(5)OK`
    D
    `CH_(3)COOK`

  • The solution of KOH in ethyl alcohol contains

    A
    `C_(2)H_(4)`
    B
    `C_(2)H_(6)`
    C
    `C_(2)H_(5)OK`
    D
    `CH_(3)COOK`

  • Denaturation of ethyl alcohol is made by adding

    A
    methanol only
    B
    pyridine only
    C
    methanol and pyridine
    D
    zinc sulphate

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