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In a solution of pH 5, the concentration of OH- ions is 10-9 moles per liter.
The concentration of H+ or OH-.
Depends on the pH, at low pH (below pH 7), the H+ ion concentration is greater, and high pH the OH- ion concentration is greater
the H+ concentration and the OH- concentration
The higher the pH, the greater the concentration of Hydroxide (OH-) ions. So, the solution with the pH of 9 is your answer.
12
The principle of a pH meter is that it measures the concentration of H+ ions in a solution. If the concentration of H+ ions is equal to the concentration of OH- ions, then the solution is neutral.
An increase in the concentration of OH- ions.
Actually pH is the negative log of the concentration of H+ ions. a neutrl liquid water has same H+ and OH- concentration which equal (10^-7) an pH = 9 solution has hundred fold less H+ ions than a solution which has pH = 7 an pH = 9 solution has hundred fold more OH- ions than a solution which has pH = 7
pH2
pH
pH 2