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

  • question_answer
    The pH value of \[1.0\times {{10}^{-8}}M\,HCl\] solution is less than 8 because

    A)                 \[HCl\] is completely ionised at this concentration

    B)                 The ionization of water is negligible

    C)                 The ionization of water cannot be assumed to be negligible in comparison with this low concentration of \[HCl\]

    D)                 The pH cannot be calculated at such a low concentration of \[HCl\]

    Correct Answer: C

    Solution :

                    As the solution is acidic, \[pH<7\]. This is because \[[{{H}^{+}}]\] from \[{{H}_{2}}O\]cannot be neglected in comparison to \[{{10}^{-8}}\].


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