Textbook Question
The following picture represents the hydrated metal cation M1H2O26 n + , where n = 1, 2, or 3.
(b) Does the equilibrium constant increase, decrease, or remain the same as the value of n increases? Explain.
314
views
Ch.16 - Aqueous Equilibria: Acids & Bases
McMurry8th EditionChemistryISBN: 9781292336145
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 - Chemical Tools: Experimentation & Measurement143
- Ch.2 - Atoms, Molecules & Ions134
- Ch.3 - Mass Relationships in Chemical Reactions149
- Ch.4 - Reactions in Aqueous Solution157
- Ch.5 - Periodicity & Electronic Structure of Atoms92
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory73
- Ch.7 - Covalent Bonding and Electron-Dot Structures47
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure51
- Ch.9 - Thermochemistry: Chemical Energy104
- Ch.10 - Gases: Their Properties & Behavior138
- Ch.11 - Liquids & Phase Changes43
- Ch.12 - Solids and Solid-State Materials56
- Ch.13 - Solutions & Their Properties98
- Ch.14 - Chemical Kinetics79
- Ch.15 - Chemical Equilibrium107
- Ch.16 - Aqueous Equilibria: Acids & Bases94
- Ch.17 - Applications of Aqueous Equilibria125
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium66
- Ch.19 - Electrochemistry130
- Ch.20 - Nuclear Chemistry73
- Ch.21 - Transition Elements and Coordination Chemistry122
- Ch.22 - The Main Group Elements155
- Ch.23 - Organic and Biological Chemistry43
Chapter 16, Problem 43b
The following pictures represent solutions of three salts NaA (A- = X-, Y-, or Z-); water molecules and Na+ ions have been omitted for clarity.
(b) Which A- anion has the strongest conjugate acid?
Verified step by step guidance1
Identify the components in each solution: NaX, NaY, and NaZ. Note the presence of A- (orange), OH- (red), and HA (gray).
Understand that the presence of HA (gray) indicates the conjugate acid of A-.
Compare the number of HA molecules in each solution. The solution with the most HA molecules indicates the strongest conjugate acid.
Observe that NaY has the highest number of HA molecules compared to NaX and NaZ.
Conclude that the A- anion in NaY has the strongest conjugate acid.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Conjugate Acids and Bases
In acid-base chemistry, a conjugate acid is formed when a base gains a proton (H+). The strength of a conjugate acid is inversely related to the strength of its corresponding base; a stronger base will have a weaker conjugate acid. Understanding this relationship is crucial for determining which anion (A-) has the strongest conjugate acid among the given salts.
Acid-Base Strength and pKa
The strength of an acid is often measured by its pKa value, which is the negative logarithm of its acid dissociation constant (Ka). A lower pKa indicates a stronger acid, meaning it dissociates more completely in solution. In this context, comparing the pKa values of the conjugate acids formed from the anions X-, Y-, and Z- will help identify which anion corresponds to the strongest conjugate acid.
Recommended video:
Guided course
00:50
Strength of Conjugate Acids and Bases
Salt Hydrolysis
When salts dissolve in water, they can undergo hydrolysis, where the anions and cations interact with water molecules. This process can affect the pH of the solution, depending on whether the anions are derived from strong or weak acids. Anions from weak acids can lead to a more acidic solution, indicating that they have stronger conjugate acids, which is essential for answering the question about the strength of the conjugate acids of the anions.
Recommended video:
Guided course
00:50Ionic Salts
Related Practice
Textbook Question
The following pictures represent solutions of three salts NaA (A- = X-, Y-, or Z-); water molecules and Na+ ions have been omitted for clarity.
(c) Which A- anion has the smallest value of pKb?
281
views
Textbook Question
Locate sulfur, selenium, chlorine, and bromine in the periodictable:(a) Which binary acid 1H2S, H2Se, HCl, or HBr2 is the strongest?Which is the weakest? Explain.
277
views
Textbook Question
The following pictures represent solutions of three salts NaA (A- = X-, Y-, or Z-); water molecules and Na+ ions have been omitted for clarity.
(a) Arrange the three A- anions in order of increasing base strength.
421
views
Textbook Question
The following picture represents the hydrated metal cation M1H2O26 n + , where n = 1, 2, or 3.
(a) Write a balanced equation for the reaction of M1H2O26 n + with water and write the equilibrium equation for the reaction.
254
views
Textbook Question
Which of the following pictures represents a solution of a weak diprotic acid, H2A? (Water molecules have been omitted for clarity.) Which pictures represent an impossible situation? Explain.
(a) (b) (c) (d)
570
views