Acid-Base Theories Quiz
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Questions and Answers

What characterizes an Arrhenius acid?

  • Forms a covalent bond with bases
  • Is only defined in gaseous states
  • Releases H+ ions in solution (correct)
  • Produces OH- ions in water
  • How does the Bronsted–Lowry definition of a base differ from that of Arrhenius?

  • It is restricted to specific reactions
  • It only considers gas-phase reactions
  • It applies to non-aqueous solutions (correct)
  • It only includes hydroxide ions
  • What is an example of a monoprotic acid?

  • H3PO4
  • HCl (correct)
  • H2SO4
  • H2CO3
  • Which of the following statements is true about polyprotic acids?

    <p>They release multiple protons through several stages</p> Signup and view all the answers

    In the reaction between NH3 and HCl, which component acts as a Bronsted–Lowry acid?

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

    Which of the following describes a Lewis acid?

    <p>Substance that accepts a pair of electrons</p> Signup and view all the answers

    What is the primary factor affecting the pH calculation of a monoprotic acid?

    <p>The ionization of a single hydrogen</p> Signup and view all the answers

    What is the active species in the Bronsted–Lowry model of acid-base reactions?

    <p>H+ ion</p> Signup and view all the answers

    Study Notes

    Arrhenius Acid-Base Theory

    • Arrhenius defined acids as substances that produce hydrogen ions (H+) when dissolved in water.
    • Arrhenius defined bases as substances that produce hydroxide ions (OH-) when dissolved in water.

    Limitations of Arrhenius Theory

    • The Arrhenius theory only applies to substances in aqueous solutions, doesn't account for reactions in other solvents.
    • The theory only considers the production of H+ and OH- ions, limiting its applicability to substances that release these ions explicitly.

    Bronsted-Lowry Acid-Base Theory

    • The Bronsted-Lowry definition of an acid is similar to Arrhenius, but it is not limited to aqueous solutions.
    • Bronsted-Lowry defines an acid as a proton donor (H+).
    • Bronsted-Lowry defines a base as a proton acceptor (H+).

    Lewis Acid-Base Theory

    • The Lewis theory defines an acid as an electron pair acceptor.
    • The Lewis theory defines a base as an electron pair donor.

    Polyprotic Acids

    • Polyprotic acids donate multiple protons per molecule.
    • They have more than one ionizable H+ atom in their structure.
    • Protons are released in stages, with the first proton being the easiest to remove.

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    Description

    Test your knowledge on the various acid-base theories, including Arrhenius, Bronsted-Lowry, and Lewis. Learn about their definitions and limitations, as well as the concept of polyprotic acids. This quiz will help reinforce your understanding of these fundamental chemical concepts.

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