Acids and Bases 1

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Author:
Yellow2
ID:
122605
Filename:
Acids and Bases 1
Updated:
2011-12-10 23:43:14
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Acids Bases
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Acids and Bases 1
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  1. A buffer sol'n consists of
    • - Weak acid + its weak conjugate base salt
    • - Weak base + its weak conjugate acid + H20
  2. Explain the buffer sol'n in action
    Adding protons will react with CB. Adding OH ions will react with weak acid (to form water)
  3. What two things does the buffer capacity depend on
    • 1. The close the pH of the buffer to the pKa of the weak acid, the great buffer capacity it has
    • 2. The greater the concentration of the weak acid and its conjugate base, the greater the buffer capacity
  4. When you increase the concentration of protons, what happens
    pH goes down
  5. A buffered sol'n is used to
    Resist change in pH. (No buildup of protons when SA is added, and -OH ions remove protons from SB- no change in pH)
  6. Write the CB of acetic acid (CH3COOH)
    CH3COO-
  7. Which strength level is most likely to go to equilibrium
    Weak
  8. What is the conjugate base of HCl
    Cl-. When HCl is added to water, it is deprotonated, the rxn goes to completion.
  9. The CB of a SA is
    Weak
  10. To maintain the pH of blood, which buffer systems are used
    • 1. carbonate
    • 2. phosphate
    • 3. proteins
  11. What is the average pH of human blood
    7.4
  12. Arrhenius definitions for an acid and a base
    • -Acid- H+ ions in aq sol'n.
    • -Base- -OH ions in aq sol'n
  13. Bronsted definitions for an acid and a baes
    • -Acid- Proton donor
    • -Base- Proton acceptor
  14. A weak acid has a (large, small) Ka
    Small (Kaiser is weak and small)
  15. If a weak acid has a small Ka, it has a (large, small) pKa
    Large

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