Identify each substance as an acid or a base and write a chemical equation showing how it is an acid or a base according to the Arrhenius definition. c. KOH(aq)
Ch.17 - Acids and Bases
Chapter 17, Problem 34b
In each reaction, identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base. b. CH3NH2(aq) + H2O(l) ⇌ CH3NH3+(aq) + OH–(aq)
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Brønsted–Lowry Acid-Base Theory
The Brønsted–Lowry theory defines acids as proton donors and bases as proton acceptors. In this framework, an acid-base reaction involves the transfer of protons (H+) from the acid to the base. This theory expands the understanding of acid-base reactions beyond just the presence of hydroxide ions, allowing for a broader range of substances to be classified as acids or bases.
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Bronsted-Lowry Acid-Base Theory
Conjugate Acid and Conjugate Base
In the context of Brønsted–Lowry theory, a conjugate acid is formed when a base accepts a proton, while a conjugate base is formed when an acid donates a proton. These pairs are related; for every acid, there is a corresponding conjugate base, and for every base, there is a corresponding conjugate acid. Understanding these relationships is crucial for analyzing acid-base reactions.
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Conjugate Acid-Base Pairs
Identifying Species in Reactions
To analyze acid-base reactions, it is essential to identify the reactants and products involved. In the given reaction, CH3NH2 acts as a base by accepting a proton from water (H2O), which acts as an acid. The products, CH3NH3+ and OH-, represent the conjugate acid and conjugate base, respectively. Recognizing these roles is key to understanding the dynamics of the reaction.
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Related Practice
Textbook Question
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Textbook Question
In each reaction, identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base. b. NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq)
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Textbook Question
In each reaction, identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base. d. C5H5N(aq) + H2O(l) ⇌ C5H5NH+(aq) + OH–(aq)
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Textbook Question
In each reaction, identify the Brønsted–Lowry acid, the Brønsted–Lowry base, the conjugate acid, and the conjugate base. c. CO32–(aq) + H2O(l) ⇌ HCO3–(aq) + OH–(aq)
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Textbook Question
Write the formula for the conjugate acid of each base. c. HCO3–
Textbook Question
Write the formula for the conjugate base of each acid. a. H2SO4