Textbook Question
Predict the products of the following acid–base reactions.
(g) HCOOH + CH3O– ⇌
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3. Acids and Bases
Acids and Bases
4:17 minutesProblem 2g,h
Textbook Question
Consider the following reaction:
HBr + -C≡N ⇌ Br− + HC≡N
g. What is the conjugate base of the acid on the right?
h. What is the conjugate acid of the base on the right?
Verified step by step guidance1
Step 1: Understand the concept of conjugate acid-base pairs. A conjugate base is formed when an acid donates a proton (H⁺), and a conjugate acid is formed when a base accepts a proton.
Step 2: Analyze the reaction provided. On the right side of the equilibrium, the acid is HC≡N (hydrogen cyanide). To find its conjugate base, remove a proton (H⁺) from HC≡N.
Step 3: Write the chemical formula for the conjugate base of HC≡N. Removing a proton from HC≡N results in C≡N⁻ (cyanide ion). This is the conjugate base of the acid HC≡N.
Step 4: On the right side of the equilibrium, the base is Br⁻ (bromide ion). To find its conjugate acid, add a proton (H⁺) to Br⁻.
Step 5: Write the chemical formula for the conjugate acid of Br⁻. Adding a proton to Br⁻ results in HBr (hydrogen bromide). This is the conjugate acid of the base Br⁻.
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Video duration:
4mKey Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Conjugate Acid-Base Pairs
In acid-base chemistry, a conjugate acid is formed when a base gains a proton (H+), while a conjugate base is what remains after an acid donates a proton. Understanding these pairs is crucial for identifying the relationships between acids and bases in a reaction.
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Acidity and Basicity
Acidity refers to the tendency of a substance to donate protons, while basicity refers to the ability to accept protons. The strength of an acid or base can influence the direction of a reaction and the stability of the resulting conjugate pairs.
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06:21Understanding the difference between basicity and nucleophilicity.
Equilibrium in Acid-Base Reactions
Acid-base reactions often reach a state of equilibrium, where the forward and reverse reactions occur at the same rate. This concept is essential for understanding how to identify conjugate acids and bases in a given reaction, as it helps predict the predominant species present at equilibrium.
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04:00Determining Acid/Base Equilibrium
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