CET Karnataka Medical CET - Karnataka Medical Solved Paper-2009

  • question_answer
    Excess of carbon dioxide is passed through \[50mL\]of \[0.5M\]calcium hydroxide solution. After the completion of the reaction, the solution was evaporated to dryness. The solid calcium carbonate was completely neutralised with 0.1 N hydrochloric acid. The volume of hydrochloric acid required is (Atomic mass of calcium = 40)

    A) \[300c{{m}^{3}}\]        

    B) \[200c{{m}^{3}}\]

    C) \[500c{{m}^{3}}\]

    D) \[400c{{m}^{3}}\]

    Correct Answer: C

    Solution :

    No. of mill moles of \[Ca{{(OH)}_{2}}=50\times 0.5=25\] No. of mill moles of \[CaC{{O}_{3}}=25\] No. of mill equivalents of \[CaC{{O}_{3}}=50\] \[\therefore \] Volume of \[0.1N\,HCl=\frac{50}{0.1}=500c{{m}^{3}}\]


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