1 / 9

pH Scale

pH Scale. 2-27-12 Standard: 5d-students know how to use the pH scale to characterize acid and base solutions. The pH Scale. The pH of a solution is a measure of its hydronium ion concentration.

fidelia-ortiz
Download Presentation

pH Scale

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 Scale 2-27-12 Standard: 5d-students know how to use the pH scale to characterize acid and base solutions

  2. The pH Scale • The pH of a solution is a measure of its hydronium ion concentration.

  3. The pH scale is a number scale from 0 to 14 to describe the concentration of hydronium ions in a solution. • A pH of 7 indicates a neutral solution. • Acids have a pH less than 7. • Bases have a pH greater than 7.

  4. If you add an acid to water, the concentration of H3O+increases and the concentration of OH- decreases. • The lower the pH value, the greater the H3O+ion concentration in solution is.

  5. If you add a base to water, the concentration of OH- increases and the concentration of H3O+decreases. • The higher the pH value, the lower the H3O+ion concentration is.

  6. Example • Substance A has a pH of 3. Substance B has a pH of 10. • Is the substance A considered acidic or basic? Is substance B considered acidic of basic? • From this does this mean there are more hydronium ions present or hydroxide ions present for substance A? Substance B? • From Friday does this mean your substances are weak or strong acids or bases?

  7. Try it on your own • Substance A has a pH of 5, Substance B has a pH of 9. • Is substance A and B considered acidic of basic? • From this does this mean there are more hydronium ions present or hydroxide ions present for substance A? Substance B? • Are substance A and B weak or strong acids or bases?

  8. Exit Question • a) What does the pH scale measure? • Given the following pH numbers is the sample a base, acid, or neutral? • A) 6 • B) 12 • C) 7 • Please include a reflection on how you feel about your activity today.

More Related