Domanda del libro di testo
The solubility of NH3 gas in water at an NH₃ pressure of 760.0 mmHg and 25°C is 51.8 g/100 mL and 27.0 g/100 mL at 50°C.
a.What is the solubility of NH3 if its partial pressure is reduced to 225.0 mmHg?
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Ch.9 Solutions
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 9, Problema 29
HF is a weak electrolyte and HBr is a strong electrolyte. Which of the curves in the figure represents the change in the boiling point of an aqueous solution when 1 mole of HF is added to 1 kg of water, and which represents the change when 1 mol of HBr is added?
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Guida verificata passo dopo passo1
Step 1: Understand the concept of boiling point elevation. Boiling point elevation occurs when a solute is added to a solvent, increasing the boiling point of the solution. The extent of elevation depends on the number of particles the solute produces in solution.
Step 2: Recognize the difference between strong and weak electrolytes. HBr is a strong electrolyte, meaning it dissociates completely into ions (H⁺ and Br⁻) in water. HF is a weak electrolyte, meaning it only partially dissociates into ions (H⁺ and F⁻) in water.
Step 3: Relate the degree of dissociation to the boiling point elevation. Since HBr dissociates completely, it produces more particles in solution compared to HF, which dissociates partially. More particles lead to a greater boiling point elevation.
Step 4: Analyze the graph provided. The curve with the greater boiling point elevation corresponds to the addition of HBr, while the curve with the smaller boiling point elevation corresponds to the addition of HF.
Step 5: Match the curves to the solutes. Based on the graph, the purple curve represents the change in boiling point for HBr (strong electrolyte), and the green curve represents the change in boiling point for HF (weak electrolyte).
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Electrolytes
Electrolytes are substances that dissociate into ions when dissolved in water, allowing the solution to conduct electricity. They are classified as strong or weak based on their degree of ionization. Strong electrolytes, like HBr, completely dissociate into ions, while weak electrolytes, like HF, only partially dissociate, affecting their colligative properties, such as boiling point elevation.
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Percorso guidato
01:07
Electrolytes (Simplified) Example 3
Boiling Point Elevation
Boiling point elevation is a colligative property that describes how the boiling point of a solvent increases when a solute is added. The extent of this elevation depends on the number of solute particles in the solution. Strong electrolytes produce more ions in solution compared to weak electrolytes, leading to a greater increase in boiling point for the same molal concentration.
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03:05Boiling Point Elevation Concept 1
Colligative Properties
Colligative properties are properties of solutions that depend on the number of solute particles rather than their identity. These include boiling point elevation, freezing point depression, vapor pressure lowering, and osmotic pressure. Understanding these properties is crucial for predicting how different solutes, like HF and HBr, will affect the boiling point of water when added in equal molar amounts.
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01:27The Colligative Properties Concept 3
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Assume that two liquids are separated by a semipermeable membrane, with pure solvent on the right side and a solution of a solute on the left side. Make a drawing that shows the situation after equilibrium is reached.
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