Presentation is loading. Please wait.

Presentation is loading. Please wait.

PH Calculations Soren Sorensen. pH Scale Self-Ionization of Water H 2 O + H 2 O  H 3 O + + OH - Though pure water is considered a non-conductor, there.

Similar presentations


Presentation on theme: "PH Calculations Soren Sorensen. pH Scale Self-Ionization of Water H 2 O + H 2 O  H 3 O + + OH - Though pure water is considered a non-conductor, there."— Presentation transcript:

1 pH Calculations Soren Sorensen

2 pH Scale

3 Self-Ionization of Water H 2 O + H 2 O  H 3 O + + OH - Though pure water is considered a non-conductor, there is a slight, but measurable conductivity due to “self- ionization”

4 K w – Ionization Constant for Water In pure water at 25  C: [H 3 O + ] = 1 x mol/L [OH - ] = 1 x mol/L K w is a constant at 25  C: Kw = [H 3 O + ][OH - ] Kw = (1 x )(1 x ) = 1 x

5 Calculating pH, pOH pH = -log 10 (H 3 O + ) pOH = -log 10 (OH - ) Relationship between pH and pOH pH + pOH = 14 Finding [H 3 O + ], [OH - ] from pH, pOH [H 3 O + ] = 10 -pH [OH - ] = 10 -pOH

6 pH + pOH = 14

7


Download ppt "PH Calculations Soren Sorensen. pH Scale Self-Ionization of Water H 2 O + H 2 O  H 3 O + + OH - Though pure water is considered a non-conductor, there."

Similar presentations


Ads by Google