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Identifying Acids and Bases quiz #5

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Terms in this set (37)

  • Which hydroxides are strong bases: Sr(OH)2, KOH, NaOH, Ba(OH)2?
    Sr(OH)2, KOH, NaOH, and Ba(OH)2 are all strong bases.
  • What is a property of a base?
    Bases taste bitter and turn red litmus paper blue.
  • What kind of compound forms an acidic solution when dissolved in water?
    A compound that releases H+ ions, such as NH4Cl, will form an acidic solution.
  • In an acid-base reaction where HA acts as an acid, what does it do?
    HA donates a proton (H+) to a base.
  • What chemical formula represents a base?
    A formula with OH-, such as NaOH, represents a base.
  • What is the principal difference between a strong and weak acid?
    A strong acid completely ionizes in water; a weak acid only partially ionizes.
  • Which substance can be classified as an Arrhenius acid?
    A substance that produces H+ ions in water, such as HCl, is an Arrhenius acid.
  • What does a base remove or accept?
    A base accepts a proton (H+) or removes H+ from solution.
  • What is the conjugate base of [Fe(H2O)6]3+(aq)?
    The conjugate base is [Fe(H2O)5(OH)]2+.
  • What is an example of a weak acid?
    HF is a weak acid.
  • Hydrochloric acid (HCl) is a strong acid. What ions are formed when HCl dissolves in water?
    HCl dissolves to form H+ (or H3O+) and Cl- ions.
  • Which acid reacted to give the salt NaCl?
    Hydrochloric acid (HCl) reacted to give NaCl.
  • What is a property of bases?
    Bases produce OH- ions and turn red litmus paper blue.
  • Is HCl an acid or a base?
    HCl is an acid.
  • What does an indicator do?
    An indicator changes color to show whether a solution is acidic or basic.
  • Conjugate acid-base pair?
    A conjugate acid-base pair consists of two species differing by one proton, such as H2O and OH-.
  • What dissolved species are present in a solution of KCN?
    K+, CN-, and possibly OH- due to hydrolysis of CN-.
  • What do acids have in common that helps differentiate them from bases?
    Acids release H+ ions in water, while bases release OH- ions.
  • What is the conjugate acid of CH3NH2?
    The conjugate acid of CH3NH2 is CH3NH3+.
  • Which hydroxide is a weak base?
    Mg(OH)2 is a weak base.
  • What color is phenolphthalein in acidic conditions?
    Phenolphthalein is colorless in acidic conditions.
  • What is an observable property of many acids?
    Many acids turn blue litmus paper red.
  • What occurs when an acid and a base react?
    An acid and a base react to form water and a salt.
  • Which is a strong acid?
    HCl is a strong acid.
  • What is a conjugate acid-base pair?
    A conjugate acid-base pair consists of two species differing by one proton.
  • Which is a base-conjugate acid pair?
    NH3 and NH4+ are a base-conjugate acid pair.
  • What is the name of the H3O+ ion?
    H3O+ is called the hydronium ion.
  • Which anions act as weak bases in solution?
    Anions such as CN-, F-, and CH3COO- act as weak bases in solution.
  • Which solution is the most basic?
    A solution of a strong base, such as NaOH, is the most basic.
  • What pH value indicates a solution is not acidic?
    A solution with pH greater than 7 is not considered acidic.
  • How do the degrees of dissociation differ for strong acids and weak acids?
    Strong acids completely dissociate; weak acids only partially dissociate.
  • When ammonium is found in solution, what does it indicate?
    Ammonium (NH4+) acts as a weak acid in solution.
  • Why is NH3 able to act as a weak base?
    NH3 can accept a proton, making it a weak base.
  • Which compound is an acid: HF, KOH, LiF, or NH3?
    HF is an acid.
  • Is the solution of C5H5NHClO4 acidic?
    Yes, C5H5NHClO4 forms an acidic solution due to the presence of the conjugate acid C5H5NH+.
  • What are produced when a base is mixed with water?
    Bases produce OH- ions when mixed with water.
  • Which acid/base pair will give an equivalence point above a pH of 7?
    A weak acid and a strong base will give an equivalence point above pH 7.