1 / 4

The pH concept

The pH concept. [H + ] is cumbersome so the pH scale was created. pH is the negative logarithm of the hydrogen-ion concentration. pH = -log[H + ]. Sample pH problems 1 of 3. The hydrogen-ion concentration of a solution is 2.7 x 10 -10 mol/L. What is the pH of the solution. Answer

lecea
Download Presentation

The pH concept

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. The pH concept • [H+] is cumbersome so the pH scale was created. • pH is the negative logarithm of the hydrogen-ion concentration. • pH = -log[H+]

  2. Sample pH problems1 of 3 • The hydrogen-ion concentration of a solution is 2.7 x 10-10 mol/L. What is the pH of the solution. • Answer • pH = -log[2.7 x 10-10] • pH = 9.6

  3. Sample pH problems2 of 3 • The pH of a solution is 6.8. What is the [H+]? • Answer • 6.8 = -log [H+] • -6.8 = log [H+] • 10x (-6.8) = log [H+] 10x • 1.6 x 10-7 mol/L = [H+]

  4. Sample pH problems3 of 3 • What is the pH of a solution if the [OH-] = 4.0 x 10-11 mol/L • Answer • [H+] x 4.0 x 10-11 mol/L = 1.0 x 10-14 M2 • [H+] = 2.5 x 10-4 mol/L • pH = -log(2.5 x 10-4 mol/L) • pH = 3.6

More Related