Name: terri j hannam
I would like to have some information on pH, and it's relation to water quality.
Answer pH is directly related to the hydrogen ion (H+) concentration in
an aqueous (water) solution. To calculate the pH of a solution, you
need to know the concentration of the H+ in molarity (i.e. moles of
H+ per liter of solution).
pH = - log[H+] where [H+] = concentration of H+ in molarity.
Thus if [H+] = 1.0 X 10^-3 then the pH = 3
pure water at room temperature (25 degrees C) has a pH of 7. However
most water that is in contact with air will contain dissolved
carbon dioxide and therefore will be slightly acidic because
the dissolved CO2 will form carbonic acid...
Note that in general, acid solutions have a pH < 7 and basic solutions
have a pH > 7. A neutral solution will have a pH = 7. Also, note
that a solution with a pH of 2 is ten times more acidic than a
solution with a pH of 3.
There are pH meters which are instruments that can measure the pH of
a solution. Also, one can use pH paper which can be immersed and
a solution and depending on the color of the paper, the pH can be
determined. Life cannot exist in highly acidic water.
Hope this helps! --- Dr. Brown
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Update: June 2012