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College Acids and Bases Questions

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College Acids and Bases
Which of the following processes could involve a color change, even in the absence of an indicator?
  1. Any decomposition reaction
  2. Any synthesis reaction
  3. The melting of a solid silver chloride precipitate
  4. A redox titration
College Acids and Bases
Which of the following equations represents the pH of the buffer?
  1. [math][HA]/[A^-][/math]
  2. 1
  3. [math][HA], only[/math]
  4. [math][A^-]/[HA][/math]
College Acids and Bases
Which of the following correctly defines buffering capacity?
  1. The amount of protons a buffer can absorb without a change in pH
  2. The amount of hydroxide ions a buffer can absorb without a change in pH
  3. The amount of protons or hydroxide ions a buffer can absorb without a change in pH
  4. None of the above
College Acids and Bases
What value is normal pH?
  1. 7.69
  2. 3.40
  3. 7.40
  4. 7.15
College Acids and Bases
Which of the following equations can be used to calculate the concentration of hydrogen ions in a buffer solution?
  1. [math][H^+] = K_a xx [[HA]]/[[A^-]][/math]
  2. [math][H^+] = K_a xx [[A^-]]/[[HA]][/math]
  3. [math][H^+] = {K_a xx [A^-]}/{[A^-] xx[HA]}[/math]
  4. None of the above
College Acids and Bases
Which of the following does NOT represent a viable buffer solution?
  1. Citric Acid/Sodium Citrate
  2. Boric Acid/Borax
  3. Carbonic Acid/Sodium Hydrogen Carbonate
  4. None of the above
College Acids and Bases
Which of the following factors involved in the use of temperature would be most useful to determine the equivalence point?
  1. the rate of temperature change
  2. the amount of heat released
  3. the most consistently low and high temperatures
  4. (a) and (b)
College Acids and Bases
What is the autoprotolysis constant of formic acid (HCOOH)?
  1. [math]6.3 xx 10^-7[/math]
  2. [math]1.0 xx 10^-14[/math]
  3. [math]3.5 xx 10^-15[/math]
  4. [math]8.0 xx 10^-20[/math]
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