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JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank Hydrogenion concentration pH scale and buffer solution

  • question_answer
    How many millilitres of \[6.0\,\,M\]hydrochloric acid should be used to prepare \[150\,\,ml\] of a solution which is \[0.30\,\,M\] in hydrogen ion                                     [Pb. PMT 1998]

    A)                 3.0         

    B)                 7.5

    C)                 9.3         

    D)                 30

    Correct Answer: B

    Solution :

               \[{{M}_{1}}=6.0\]M of HCl ; \[{{V}_{1}}=?\]                    \[{{M}_{2}}\]=0.30 M is \[{{H}^{+}}\]concentration in solution.                    \[{{V}_{2}}=\]150 ml of solution.                    \[{{M}_{1}}{{V}_{1}}={{M}_{2}}{{V}_{2}}\]; \[6.0\times {{V}_{1}}=.30\times 150\]                                 \[{{V}_{1}}=\frac{.30\times 150}{6}=7.5\]ml.


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