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Weak Base Strong Acid Titrations quiz

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Terms in this set (15)

  • What type of chart do we use when reacting a weak base with a strong acid in titrations?
    We use an ICF (Initial, Change, Final) chart, and the units are in moles.
  • What is the product when ammonia (NH3) reacts with a strong acid like HBr?
    The product is NH4+ (ammonium ion), which is the conjugate acid, and Br-.
  • What does a strong acid do in a reaction with a weak base?
    A strong acid donates an H+ ion to the weak base.
  • What is another term for the conjugate acid formed in a weak base-strong acid titration?
    The conjugate acid can also be called a weak acid.
  • Before the equivalence point, which species is present in greater amount: weak base or strong acid?
    The weak base is present in a greater amount than the strong acid.
  • What type of solution is present before the equivalence point in a weak base-strong acid titration?
    A buffer solution is present, containing both weak acid and conjugate base.
  • Which equation can be used to calculate pH before the equivalence point in a weak base-strong acid titration?
    The Henderson-Hasselbalch equation can be used.
  • After the equivalence point, which species is present in greater amount: weak base or strong acid?
    The strong acid is present in a greater amount than the weak base.
  • How do you calculate the pH after the equivalence point in a weak base-strong acid titration?
    Find the concentration of the remaining strong acid and take the negative log of that concentration.
  • At the equivalence point, what is true about the moles of weak base and strong acid?
    The moles of weak base and strong acid are equal.
  • What is the only species left at the equivalence point in a weak base-strong acid titration?
    Only the weak acid (conjugate acid) is left.
  • What type of chart is used to determine pH at the equivalence point in a weak base-strong acid titration?
    An ICE (Initial, Change, Equilibrium) chart is used.
  • What constant is used to calculate pH at the equivalence point when only weak acid remains?
    The Ka (acid dissociation constant) of the weak acid is used.
  • What are the three key stages to consider in a weak base-strong acid titration?
    The three stages are before the equivalence point, at the equivalence point, and after the equivalence point.
  • When using an ICF chart in titrations, which three species do we focus on?
    We focus on the strong species, the weak acid, and its conjugate base.