1 / 8

2-2 Acids, Bases and pH I. Acids

2-2 Acids, Bases and pH I. Acids. Latin acere = sour Properties: Taste sour Reacts with some metals to release hydrogen gas Become less acidic when mixed with bases Are located between 0 and 7 on the pH scale (Stronger acids = lower numbers) Conduct electricity.

robert-ward
Télécharger la présentation

2-2 Acids, Bases and pH I. Acids

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. 2-2 Acids, Bases and pHI. Acids • Latin acere = sour • Properties: • Taste sour • Reacts with some metals to release hydrogen gas • Become less acidic when mixed with bases • Are located between 0 and 7 on the pH scale (Stronger acids = lower numbers) • Conduct electricity

  2. C. All acids contain Hydrogen, and when they are dissolved in H2O will release H+ ions in solution. Example: HCl + H2O H+ (aq) + Cl- (aq) (aq) = aqueous or “in water”

  3. II. Bases • Used to be called Alkalies • Properties: • Taste bitter (think aspirin) • Feel slimey or slippery • Are located between 7 and 14 on the pH scale (strong bases = high numbers) • Can be very dangerous because they are extremely reactive • Conduct electricity

  4. All bases contain OH (hydroxide) and will release OH- ions when dissolved in water Example: NaOH + H2O  Na+ (aq) + OH- (aq) (aq) = aqueous or “in water”

  5. III. pH • Measures the number of H+ ions in a solution. • Many H+ ions means the pH is very low or acidic (stomach acid, vinegar) • Few H+ ions means pH is very high or basic (bleach, soap) • Same number of each ion = neutral 7 (water, blood)

  6. That’s basically it….(get it?)

  7. Acids + bases will neutralize each other H+(aq) + OH-(aq) H20 • An acid + a base will always produce water and a salt Acid Base Water Salt HCl +  NaOH  H2O + NaCl (hydrochloric acid + sodium hydroxide = water and salt)

  8. F. Buffers – keep pH from sharply increasing or decreasing = homeostasis

More Related