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Ch.13 - Solutions & Their Properties
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Capitolo 13, Problema 86

Sulfur hexafluoride, which is used as a nonflammable insulator in high-voltage transformers, has a Henry’s law constant of 2.4 * 10⁻⁴ mol/L·atm at 25 °C. What is the solubility in mol/L of sulfur hexafluoride in water at 25 °C and a partial pressure of 2.00 atm?

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1
Identify the given values: Henry's law constant \( k_H = 2.4 \times 10^{-4} \text{ mol/L·atm} \) and the partial pressure \( P = 2.00 \text{ atm} \).
Recall Henry's Law, which states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. The formula is \( S = k_H \times P \), where \( S \) is the solubility.
Substitute the given values into the Henry's Law equation: \( S = (2.4 \times 10^{-4} \text{ mol/L·atm}) \times (2.00 \text{ atm}) \).
Perform the multiplication to find the solubility \( S \) in mol/L.
Interpret the result to understand the solubility of sulfur hexafluoride in water under the given conditions.

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Henry's Law

Henry's Law states that the amount of gas that dissolves in a liquid at a given temperature is directly proportional to the partial pressure of that gas above the liquid. This relationship can be expressed mathematically as C = kH * P, where C is the concentration of the gas in the liquid, kH is the Henry's law constant, and P is the partial pressure of the gas.
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Solubility

Solubility refers to the maximum amount of a substance that can dissolve in a given volume of solvent at a specific temperature and pressure. In the context of gases, solubility is often expressed in terms of molarity (mol/L), indicating how many moles of gas can be dissolved in one liter of solvent.
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Solubility Rules

Partial Pressure

Partial pressure is the pressure exerted by a single component of a mixture of gases. In the context of solubility, the partial pressure of a gas above a liquid influences how much of that gas can dissolve in the liquid, as described by Henry's Law. It is typically measured in atmospheres (atm) or other pressure units.
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