Domanda del libro di testo
Which of the following species behave as strong acids or as
strong bases in aqueous solution?
(a) HNO2 (b) HNO3(c) NH4+ (d) Cl-
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Ch.16 - Aqueous Equilibria: Acids & Bases
McMurry8th EditionChemistryISBN: 9781292336145
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TOC.tableOfContents
- Ch.1 - Chemical Tools: Experimentation & Measurement170
- Ch.2 - Atoms, Molecules & Ions160
- Ch.3 - Mass Relationships in Chemical Reactions169
- Ch.4 - Reactions in Aqueous Solution199
- Ch.5 - Periodicity & Electronic Structure of Atoms102
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory92
- Ch.7 - Covalent Bonding and Electron-Dot Structures61
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure59
- Ch.9 - Thermochemistry: Chemical Energy122
- Ch.10 - Gases: Their Properties & Behavior155
- Ch.11 - Liquids & Phase Changes54
- Ch.12 - Solids and Solid-State Materials73
- Ch.13 - Solutions & Their Properties120
- Ch.14 - Chemical Kinetics98
- Ch.15 - Chemical Equilibrium125
- Ch.16 - Aqueous Equilibria: Acids & Bases110
- Ch.17 - Applications of Aqueous Equilibria147
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium86
- Ch.19 - Electrochemistry154
- Ch.20 - Nuclear Chemistry96
- Ch.21 - Transition Elements and Coordination Chemistry156
- Ch.22 - The Main Group Elements187
- Ch.23 - Organic and Biological Chemistry51
Capitolo 16, Problema 83
Calculate the pH of the following solutions: (c) 0.075 M NaOH
Guida verificata passo dopo passo1
Identify that NaOH is a strong base, which means it dissociates completely in water to produce OH⁻ ions.
Write the dissociation equation for NaOH: \[ \text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^- \]
Determine the concentration of OH⁻ ions, which is equal to the initial concentration of NaOH, 0.075 M, because it dissociates completely.
Use the formula for pOH: \[ \text{pOH} = -\log[\text{OH}^-] \] to calculate the pOH of the solution.
Convert pOH to pH using the relationship: \[ \text{pH} = 14 - \text{pOH} \].
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pH Scale
The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14. A pH of 7 is considered neutral, values below 7 indicate acidic solutions, and values above 7 indicate basic solutions. The scale is logarithmic, meaning each whole number change represents a tenfold change in hydrogen ion concentration.
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Percorso guidato
02:33
The pH Scale
Strong Bases
Strong bases, like sodium hydroxide (NaOH), completely dissociate in water to produce hydroxide ions (OH-). This complete dissociation means that the concentration of hydroxide ions in the solution is equal to the concentration of the base. Understanding this concept is crucial for calculating the pH of basic solutions.
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Percorso guidato
01:09Strong Acid-Strong Base Titration
Calculating pH from pOH
To find the pH of a basic solution, one can first calculate the pOH using the formula pOH = -log[OH-]. Since pH and pOH are related by the equation pH + pOH = 14, once the pOH is determined, the pH can be easily calculated. This relationship is essential for converting between the two measures of acidity and basicity.
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Percorso guidato
02:09pH and pOH Calculations
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