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Identifying Acids and Bases quiz #6

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Terms in this set (39)

  • Why are strong acids also strong electrolytes?
    Strong acids completely ionize in water, making them strong electrolytes.
  • When hydrochloric acid dissolves in water what ions are formed?
    HCl dissolves to form H+ (or H3O+) and Cl- ions.
  • Which ion will be basic in aqueous solution?
    Anions such as CH3COO- or CN- will be basic in aqueous solution.
  • What indicates the presence of a strong base in solution?
    A high pH and complete dissociation indicate a strong base is present.
  • Which species is the conjugate base of NH3?
    The conjugate base of NH3 is NH2-.
  • What is the conjugate acid of HSO4-?
    The conjugate acid of HSO4- is H2SO4.
  • What is an example of a Brønsted-Lowry acid?
    A Brønsted-Lowry acid is a proton donor, such as HCl.
  • What is the conjugate base of HBr?
    The conjugate base of HBr is Br-.
  • What is an example of a conjugate acid-base pair?
    NH4+ and NH3 are an example of a conjugate acid-base pair.
  • What is a characteristic that bases do not have?
    Bases do not turn blue litmus paper red.
  • What type of species cannot act as a Brønsted base?
    A species that cannot accept a proton cannot act as a Brønsted base.
  • Is a litmus paper test qualitative or quantitative?
    A litmus paper test is qualitative.
  • What is the conjugate acid of H2O?
    The conjugate acid of H2O is H3O+.
  • How are acids and protons related?
    Acids are substances that donate protons (H+).
  • Which is the conjugate base of water?
    The conjugate base of water is OH-.
  • What is the conjugate acid of HCO3-?
    The conjugate acid of HCO3- is H2CO3.
  • Bases typically have what compound in them?
    Bases typically contain hydroxide ions (OH-).
  • Acids typically have what compound in them?
    Acids typically contain hydrogen ions (H+).
  • What is a limitation of the Arrhenius model of acids and bases?
    The Arrhenius model only applies to aqueous solutions and does not account for all acid-base reactions.
  • When sodium hydroxide dissolves in water, what ions are formed?
    NaOH dissolves to form Na+ and OH- ions.
  • Which type of substance yields hydrogen ions?
    Acids yield hydrogen ions (H+).
  • Which of these is an Arrhenius base?
    NaOH is an Arrhenius base.
  • Which salt has a pH < 7?
    A salt formed from a strong acid and a weak base, such as NH4Cl, has pH < 7.
  • All bases produce which ion in aqueous solution?
    All bases produce hydroxide ions (OH-) in aqueous solution.
  • Which choice is not a property of an acid?
    Acids do not turn red litmus paper blue.
  • How would you describe an acid with a pH of 1?
    An acid with pH 1 is a strong acid.
  • Should you add concentrated acid to water or add water to concentrated acid?
    Always add acid to water to avoid splattering.
  • What is the function of an indicator in a titration?
    An indicator signals the endpoint of a titration by changing color.
  • What is the conjugate acid of ClO-?
    The conjugate acid of ClO- is HClO.
  • What two substances are always produced in a neutralization reaction?
    Water and a salt are always produced in a neutralization reaction.
  • What is true about strong acids?
    Strong acids completely ionize in water.
  • What color does the phenolphthalein turn when the solution is basic?
    Phenolphthalein turns pink in basic solutions.
  • What is an example of an open system?
    A beaker open to the air is an example of an open system.
  • Would a solution be an acid or a base if it has less hydronium ions within it?
    A solution with fewer hydronium ions is basic.
  • Which substance among BF3, HCN, NH3, and Mg(OH)2 is an Arrhenius acid?
    HCN is an Arrhenius acid.
  • What color does red litmus paper turn when placed in an alkali?
    Red litmus paper turns blue in an alkali (base).
  • A compound that releases hydroxide ions in solution would most likely have which chemical property?
    It would be basic.
  • Which substance is an acid: LiOH, Mg(OH)2, CH3COOH, NaCl?
    CH3COOH is an acid.
  • Consider this reaction: HCO3- + H2S → H2CO3 + HS-. Which is the conjugate acid?
    H2CO3 is the conjugate acid.