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

  • question_answer
    If the dissociation constant of an acid HA is \[1\times {{10}^{-5}},\] the \[pH\] of a 0.1 molar solution of the acid will be approximately   [NCERT 1979]

    A)                 Three   

    B)                 Five

    C)                 One      

    D)                 Six

    Correct Answer: A

    Solution :

                    \[[{{H}^{+}}]=\sqrt{Kc}=\sqrt{{{10}^{-5}}\times 0.1}={{10}^{-3}},\,\,\,pH=3\].


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