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Ionic Salts of Weak Acids and Bases quiz

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  • What is formed when an acid neutralizes a base?
    An ionic compound called a salt is formed.
  • What determines whether an ionic salt solution is neutral, acidic, or basic?
    It depends on the acid-base properties of the cations and anions in the salt.
  • How are cations classified when analyzing ionic salts?
    Cations are classified as transition metals, main group metals, or positive amines.
  • What charge must a transition metal cation have to be considered acidic?
    A transition metal cation must have a charge of +2 or higher to be acidic.
  • What is the minimum charge required for a main group metal cation to be acidic?
    A main group metal cation must have a charge of +3 or higher to be acidic.
  • How are positive amines classified in terms of acidity?
    Positive amines are automatically considered acidic.
  • What is the rule for determining if an anion is basic or neutral?
    Add an H+ to the anion; if it forms a weak acid, the anion is basic; if it forms a strong acid, the anion is neutral.
  • Why is F- considered a basic anion?
    Because adding H+ to F- forms HF, which is a weak acid, making F- a basic anion.
  • Why is Br- considered a neutral anion?
    Because adding H+ to Br- forms HBr, a strong acid, making Br- a neutral anion.
  • What is the overall solution type when a neutral cation is paired with a basic anion?
    The solution will be basic.
  • What are amphoteric species?
    Amphoteric species are compounds that can act as either an acid or a base.
  • Name two examples of acidic amphoteric species.
    Bisulfate (HSO4-) and dihydrogen phosphate (H2PO4-) are acidic amphoteric species.
  • Name two examples of basic amphoteric species.
    Bicarbonate (HCO3-) and hydrogen phosphate (HPO4^2-) are basic amphoteric species.
  • What property allows amphoteric species to act as both acids and bases?
    They possess hydrogens (can donate H+) and negative charges (can accept H+).
  • How are amphoteric species classified as acidic or basic?
    They are classified based on their Ka values and their tendency to act as acids or bases.