Query

Asked by nishac | 30th Jun, 2009, 03:14: PM

Expert Answer:

In earlier syllabus the numericals on pH were in the course.

(a) pH = - log [H+]

Where [H+]  is the concentration of hydrogen ions in the solution.

pH = - log (1 x 10 -7)

pH = - log (10 -7)

pH  = - (-7) log 10

pH = 7  Since log 10 = 1

(b) Since the pH  = 7 the solution is neutral.

If the pH value of a solution is <7, it is acidic

If the pH value of = 7, the solution is neutral

If the pH value > 7 the solution is basic.

 

Answered by  | 30th Jun, 2009, 04:31: PM

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