question_answer 1)

  The pH of neutral water at \[25{}^\circ C\]is 7.0. As the temperature increases, ionisation of water increases, however, the concentration of \[{{H}^{+}}\] ions and \[O{{H}^{-}}\] ions are equal. What will be the pH of pure water at 60°C? (a) Equal to 7.0                  (b) Greater than 7.0        (c) Less than 7.0                (d) Equal to zero

Answer:

  (c) At 60°C, water will ionise more and hence the concentration of\[[{{H}^{+}}]\] increases as a result of which pH becomes less than 7.