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Arrhenius definition Knowledge-Based Practice

Chemistry · Acids & Bases · Chemistry · Acid–Base Concepts

5 Chemistry practice questions on Arrhenius definition. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which of the following substances behaves as an Arrhenius base when dissolved in water?

    • A) SO2\text{SO}_2
    • B) CH3COOH\text{CH}_3\text{COOH}
    • C) CH3CH2OH\text{CH}_3\text{CH}_2\text{OH}
    • D) Ba(OH)2\text{Ba(OH)}_2
  2. 2.

    According to the Arrhenius theory, which statement correctly describes the process of neutralization between an acid and a base in an aqueous solution?

    • A) Protons are transferred directly between neutral solute molecules to generate a conjugate acid–base pair.
    • B) A coordinate covalent bond forms as an electron-pair donor shares electrons with an electron-pair acceptor.
    • C) Dissolved ionic salts precipitate out of solution due to the complete dehydration of dissolved counterions.
    • D) Hydrogen ions supplied by the acid combine with hydroxide ions supplied by the base to form water.
  3. 3.

    Which of the following statements describes a fundamental limitation of the Arrhenius acid–base definition?

    • A) It fails to classify ionic hydroxides such as potassium hydroxide as bases in aqueous media.
    • B) It cannot account for the formation of hydronium ions when strong monoprotic acids dissolve in water.
    • C) It incorrectly assumes that all neutralization reactions between strong acids and strong bases yield water.
    • D) It restricts acid–base behavior strictly to aqueous solutions and cannot explain the basic properties of ammonia.
  4. 4.

    Which of the following chemical equations explicitly illustrates the behavior of an Arrhenius acid in an aqueous medium?

    • A) KOH(s)→H2OK+(aq)+OH−(aq)\text{KOH}(s) \xrightarrow{\text{H}_2\text{O}} \text{K}^+(aq) + \text{OH}^-(aq)
    • B) HClO4(aq)→H+(aq)+ClO4−(aq)\text{HClO}_4(aq) \rightarrow \text{H}^+(aq) + \text{ClO}_4^-(aq)
    • C) NH3(g)+HCl(g)→NH4Cl(s)\text{NH}_3(g) + \text{HCl}(g) \rightarrow \text{NH}_4\text{Cl}(s)
    • D) BF3+F−→BF4−\text{BF}_3 + \text{F}^- \rightarrow \text{BF}_4^-
  5. 5.

    According to the Arrhenius definition, which of the following statements correctly characterizes an acid and a base in an aqueous solution?

    • A) An acid increases the concentration of H+\text{H}^+ ions, whereas a base increases the concentration of OH−\text{OH}^- ions.
    • B) An acid donates a proton to another species, whereas a base accepts a proton from another species.
    • C) An acid accepts an electron pair, whereas a base donates an electron pair to form a coordinate covalent bond.
    • D) An acid decreases the concentration of H+\text{H}^+ ions, whereas a base decreases the concentration of OH−\text{OH}^- ions.

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