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Acids, Bases and Buffers OH MY!!

Acids, Bases and Buffers OH MY!!. Acids, Bases and pH. One water molecule is made of two ions, (H+) and a Hydroxide Ion (OH-) Hydrogen Ion Hydroxide Ion Acid Base. H 2 O  H + + OH -. Acids and Bases. Acid : A solution with lots of H + ions

mohammad-jennings
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Acids, Bases and Buffers OH MY!!

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  1. Acids, Bases and Buffers OH MY!!

  2. Acids, Bases and pH One water molecule is made of two ions, (H+) and a Hydroxide Ion (OH-) Hydrogen Ion Hydroxide Ion Acid Base H2O  H+ + OH-

  3. Acids and Bases • Acid: A solution with lots ofH+ ions • pH0 up to 7 is acid (acidic) • Base:A solution with lots of OH- ions • pHabove 7 – 14 is basic (alkaline)

  4. The pH Scale…acids • Indicates the percent of H+ ions • Ranges from 0 – 14 • pH of 7 is neutral • Each pH unit represents a factor of 10X change in concentration • pH 3 is 10 x 10 x 10 (1000x) stronger than a pH of 6

  5. The pH Scale…bases

  6. Buffers • Weak acids or bases that react with strong acids or bases to prevent sharp, sudden changes in pH (neutralization). • Produced naturally by the bodyto maintainhomeostasis Weak Acid Weak Base

  7. Procedure:Wear Goggles at all times! • Add 50 mL of cabbage juice indicator • Half teaspoon baking soda to one beaker—label “Buffer” • Label other beaker “Control.” • Half teaspoon of Sprite to “Buffer” beaker. Stir. • Continue adding Sprite until “Buffer” matches other beaker color. 5. Add 2 drops of vinegar to “Control” beaker-swirl. 6. Repeat with “Buffer.” 7. Alternate adding vinegar. 8. Observe color reactions and record amounts of vinegar.

  8. After Clean Up! • Answer questions in #10. • Add the following after reading the info on the reverse side: • What is alkalosis? • What could lead to alkalosis in the body? • What is acidosis? • What could lead to acidosis in the body?

  9. Ticket out the Door Draw a water molecule with labeled atoms and charges. What is the property called that describes water sticking to itself? What makes a solution acidic? What has a higher pH, bleach or lemon juice?

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