Acids and Bases
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Questions and Answers

According to the Arrhenius definition, what is a weak base?

  • A substance that slightly dissociates in water to give OH- ions (correct)
  • A substance that completely dissociates in water
  • A proton donor
  • A substance that does not involve OH- ions
  • Which theory of acids and bases expanded the scope beyond solutions dissolved in water?

  • Hydroxide Theory
  • Bronsted – Lowry Theory (correct)
  • Acid-Base Theory
  • Arrhenius Definition
  • What is the term used to describe a substance that can act as both an acid and a base?

  • Strong
  • Amphiprotic (correct)
  • Arrhenius
  • Neutral
  • Which type of acids dissociate to give two H+ ions in aqueous solution?

    <p>Dibasic acids</p> Signup and view all the answers

    What is the characteristic of strong acids in terms of dissociation in water?

    <p>They fully dissociate in water</p> Signup and view all the answers

    Why do H+ ions bond with a water molecule to form a hydronium ion in water?

    <p>H+ ions cannot exist on their own in water</p> Signup and view all the answers

    What must HC2O4- do to change into its conjugate base?

    <p>Donate a proton</p> Signup and view all the answers

    Which substance is formed when the hydrogen ion from an acid is replaced by a metal or ammonium ion?

    <p>Salt</p> Signup and view all the answers

    What is the purpose of adding limestone to lakes in areas suffering from acid rain?

    <p>To neutralise acidity</p> Signup and view all the answers

    According to the Bronsted-Lowry theory, a weak acid is characterized as __________.

    <p>A poor proton donor</p> Signup and view all the answers

    Which of the following statements is true regarding the Arrhenius Theory and the Bronsted-Lowry Theory?

    <p>Arrhenius Theory is limited to reactions in water, while Bronsted-Lowry Theory is not limited to reactions in water.</p> Signup and view all the answers

    In a conjugate acid-base pair according to the text, what defines the relationship between the acid and the base?

    <p>They differ by one proton.</p> Signup and view all the answers

    According to the Brønsted-Lowry theory, how do strong acids differ from weak acids?

    <p>Strong acids are good proton donors, while weak acids are poor proton donors.</p> Signup and view all the answers

    Identify the conjugate base of the weak acid HA and explain why it is weaker than the conjugate base of sulfuric acid.

    <p>A- is the conjugate base of HA and weaker because it is less stable.</p> Signup and view all the answers

    Why is the conjugate base of sulfuric acid, HSO4-, considered an acid itself? Provide a balanced equation for its dissociation in water.

    <p>HSO4- can donate a proton to water, forming H3O+, making it an acid.</p> Signup and view all the answers

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