Acid & Base Definitions

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| By Msorensen
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  • 1/6 Questions

    Which of the following defines an acid as a species that can accept electron pairs?

    • Bronsted-Lowry
    • Arrhenius
    • Lewis
    • Svante
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About This Quiz

Acids and bases can be defined in different ways. We have covered these definitions in class today and you are now expected to pass the quiz that will cover that topic in the next class. The test below is designed to give you a scoop of what is expected of you. Give it a try and polish up on what you fail to answer.

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  • 2. 

    What is the definition of an Arrhenius base?

    • Any substance that can donate a proton

    • Any species that can accept electron pairs

    • Any substance that can accept a proton

    • A substance that when dissolved in water produces OH- ions, it is an OH- donor

    • A substance that when dissolved in water dissociates to form H+ ions

    Correct Answer
    A. A substance that when dissolved in water produces OH- ions, it is an OH- donor
    Explanation
    An Arrhenius base is defined as a substance that, when dissolved in water, produces hydroxide ions (OH-) and acts as an OH- donor. This definition distinguishes Arrhenius bases from other options such as substances that can donate a proton or accept electron pairs. Arrhenius bases specifically produce OH- ions when dissolved in water, allowing them to increase the concentration of hydroxide ions in a solution.

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  • 3. 

    Which of the following defines an base as any substance that can accept an H+ ion?

    • Arrhenius

    • Lewis

    • Bronsted-Lowry

    Correct Answer
    A. Bronsted-Lowry
    Explanation
    The Bronsted-Lowry definition of a base states that it is any substance that can accept a hydrogen ion (H+). This definition is different from the Arrhenius definition, which defines a base as a substance that produces hydroxide ions (OH-) in water, and the Lewis definition, which defines a base as any electron pair donor. The Bronsted-Lowry definition is more inclusive as it allows for bases that do not necessarily need to be in water or produce hydroxide ions.

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  • 4. 

    Which of the following is the definition of a Bronsted-Lowry base?

    • Any substances that can donate H+ ions

    • A substance when dissolved in water produces OH- ions

    • Any substance that can accept H+ ions (proton)

    • A substance that when dissolved in water dissociates to form hydrogen ions

    Correct Answer
    A. Any substance that can accept H+ ions (proton)
    Explanation
    A Bronsted-Lowry base is defined as any substance that can accept H+ ions (protons). This means that when a Bronsted-Lowry base reacts with an acid, it accepts a proton from the acid, forming a new compound. The base acts as a proton acceptor in the reaction. This definition is different from the other options because it focuses on the ability of a substance to accept protons, rather than donate or produce them.

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  • 5. 

    What is an arrhenius acid?

    • Any substance that can donate an H+ ion

    • A substance that when dissolved in water dissociates to form hydrogen ions

    • Any substance that can accept an H+ ion

    • Any species that can accept electron pairs

    Correct Answer
    A. A substance that when dissolved in water dissociates to form hydrogen ions
    Explanation
    An Arrhenius acid is defined as a substance that, when dissolved in water, dissociates to form hydrogen ions. This means that it releases H+ ions into the solution. This is in contrast to an Arrhenius base, which would instead release hydroxide ions (OH-) when dissolved in water. Therefore, the correct answer is "a substance that when dissolved in water dissociates to form hydrogen ions."

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  • 6. 

    Which of the following is a good Lewis base?

    • Any species with lone pairs on the central atom

    • H3O+

    • Any species that can accept electron pairs

    • Any substance that can accept an H+ ion

    • Any substance that can donate an H+ ion

    Correct Answer
    A. Any species with lone pairs on the central atom
    Explanation
    A Lewis base is a species that can donate a pair of electrons. In the given options, the only choice that fits this definition is "any species with lone pairs on the central atom." This is because species with lone pairs on the central atom have the ability to donate those electrons, making them good Lewis bases. The other options, such as H3O+, refer to species that can accept electrons or donate or accept H+ ions, which do not fit the definition of a Lewis base.

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  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 28, 2009
    Quiz Created by
    Msorensen
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