1 / 7

pH Calculations

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 is a slight, but measurable conductivity due to “self-ionization”. K w – Ionization Constant for Water.

cato
Télécharger la présentation

pH Calculations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. pH Calculations Soren Sorensen

  2. pH Scale

  3. Self-Ionization of Water H2O + H2O  H3O+ + OH- Though pure water is considered a non-conductor, there is a slight, but measurable conductivity due to “self-ionization”

  4. Kw – Ionization Constant for Water In pure water at 25 C: [H3O+] = 1 x 10-7 mol/L [OH-] = 1 x 10-7 mol/L Kw is a constant at 25 C: Kw = [H3O+][OH-] Kw= (1 x 10-7)(1 x 10-7) = 1 x 10-14

  5. Calculating pH, pOH pH = -log10(H3O+) pOH = -log10(OH-) Relationship between pH and pOH pH + pOH = 14 Finding [H3O+], [OH-] from pH, pOH [H3O+] = 10-pH [OH-] = 10-pOH

  6. pH + pOH = 14

More Related