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Manipal Medical Manipal Medical Solved Paper-2000

  • question_answer
    The molality of 90%\[{{H}_{2}}S{{O}_{4}}\]solution is [density\[=1.8\text{ }g\text{ }ml\]]:

    A)  1.8               

    B)  48.4

    C)  91.8              

    D)  94.6

    Correct Answer: C

    Solution :

     The density of solution\[=1.8\text{ }g\text{ }ml\] Weight of one litre of solution = 1800 g \[\therefore \] weight of\[{{H}_{2}}S{{O}_{4}}\]in the solution \[=\frac{1800\times 90}{100}\] \[=1620g\] \[\therefore \]weight of solvent \[=1800-1620\]        \[=180gm\] \[\therefore \]molality\[=\frac{1620}{98}\times \frac{100}{180}=91.8\]


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