Domanda del libro di testo
Calculate the pH of a solution made by adding 2.50 g of lithium oxide 1Li2O2 to enough water to make 1.500 L of solution.
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Ch.16 - Acid-Base Equilibria
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 16, Problema 102
Which, if any, of the following statements are true? (a) The stronger the base, the smaller the pKb. (b) The stronger the base, the larger the pKb. (c) The stronger the base, the smaller the Kb. (d) The stronger the base, the larger the Kb. (e) The stronger the base, the smaller the pKa of its conjugate acid. (f) The stronger the base, the larger the pKa of its conjugate acid.
Guida verificata passo dopo passo1
Understand the relationship between base strength and Kb: A stronger base has a larger Kb value because it dissociates more in solution, increasing the concentration of OH⁻ ions.
Relate Kb to pKb: pKb is the negative logarithm of Kb (pKb = -log(Kb)). Therefore, a larger Kb results in a smaller pKb.
Analyze statement (a): 'The stronger the base, the smaller the pKb.' This is true because a stronger base has a larger Kb, leading to a smaller pKb.
Analyze statement (b): 'The stronger the base, the larger the pKb.' This is false because a stronger base has a larger Kb, which results in a smaller pKb.
Consider the relationship between a base and its conjugate acid: A stronger base has a weaker conjugate acid, which means the conjugate acid has a larger pKa. Therefore, statement (f) is true.
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Base Strength and pKb
The strength of a base is inversely related to its pKb value. A stronger base has a lower pKb, indicating a greater tendency to accept protons. This relationship is crucial for understanding how bases behave in chemical reactions and how their strength can be quantified.
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Percorso guidato
00:50
Strength of Conjugate Acids and Bases
Base Strength and Kb
The base dissociation constant (Kb) measures the strength of a base in solution. A stronger base corresponds to a larger Kb value, reflecting its ability to dissociate and produce hydroxide ions. This concept is essential for comparing the relative strengths of different bases.
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Percorso guidato
03:01Ka and Kb Relationship
Conjugate Acids and pKa
The pKa of a conjugate acid is a measure of its acidity, with lower pKa values indicating stronger acids. For a stronger base, the pKa of its conjugate acid will be smaller, as stronger bases correspond to weaker conjugate acids. Understanding this relationship helps in predicting the behavior of acids and bases in chemical equilibria.
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Percorso guidato
01:30Conjugate Acid-Base Pairs
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Predict how each molecule or ion would act, in the Brønsted-Lowry sense, in aqueous solution by writing 'acid,' 'base,' 'both,' or 'neither' on the line provided. (b) Prozac
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Domanda del libro di testo
A solution is made by adding 0.300 g Ca1OH221s2, 50.0 mL of 1.40 M HNO3, and enough water to make a final volume of 75.0 mL. Assuming that all of the solid dissolves, what is the pH of the final solution?
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Domanda del libro di testo
Salts containing the phosphate ion are added to municipal
water supplies to prevent the corrosion of lead pipes. (a) Based
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pKa2 = 6.2 * 10 - 8, pKa3 = 4.2 * 10 - 132 what is the Kb
value for the PO43 - ion?
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Domanda del libro di testo
Indicate whether each of the following statements is correct or incorrect. (d) K+ ion is acidic in water because it causes hydrating water molecules to become more acidic.
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