2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Equilibrium / साम्यावस्था

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

  • question_answer
    A solution has \[pH=5\], it is diluted 100 times, then it will become           [NCERT 1978; AFMC 2005]

    A)                 Neutral                

    B)                 Basic

    C)                 Unaffected        

    D)                 More acidic

    Correct Answer: A

    Solution :

               \[pH=5,\] means \[[{{H}^{+}}]={{10}^{-5}}M.\] After dilution \[[{{H}^{+}}]={{10}^{-5}}/100={{10}^{-7}}M\] \[[{{H}^{+}}]\] from \[{{H}_{2}}O\] cannot be neglected. Total \[[{{H}^{+}}]={{10}^{-7}}+{{10}^{-7}}=2\times {{10}^{-7}}\]                                 \[pH=7-0.3010=6.6990=7\](neutral).      


You need to login to perform this action.
You will be redirected in 3 sec spinner