Los peces neoesitan al menos 4 ppm de O2 disuelto para sobrevivir. (a) Exprese esa concentración

step 1 Problem 93 Assume the density of solution is 1 gram per milliliter Okay in part 8 4 ppm equals t

Los peces neoesitan al menos 4 ppm de O2 disuelto para...

Los peces neoesitan al menos $4 \mathrm{ppm}$ de $\mathrm{O}_2$ disuelto para sobrevivir. (a) Exprese esa concentración en $\mathrm{mol} / \mathrm{L}$. (b) ¿Qué presión parcial sobre el agua se requiere para tener esa concentración a $10^{\circ} \mathrm{C}$ ? (La constante de la ley de Henry para el $\mathrm{O}_2$ a esta temperatura es de $1.71 \times 10^{-3} \mathrm{~mol} / \mathrm{L}-\mathrm{atm}$.)

Key Concepts

Parts per Million (ppm)

Parts per million is a way of expressing very dilute concentrations of substances. In aqueous solutions, one part per million typically means one milligram of solute per liter of water, assuming the density of water is approximately 1 g/mL. This conversion is essential for translating mass-based measurements into moles when further calculations require molarity.

Molarity

Molarity is the concentration of a solute expressed in moles per liter of solution. It is a fundamental unit in chemistry for quantifying how much of a substance is present in a given volume, which is particularly useful for reactions, equilibrium, and solubility problems.

Henry's Law

Henry's law states that at constant temperature, the amount of dissolved gas in a liquid is directly proportional to its partial pressure in the gas phase. This law is key in solving problems involving the solubility of gases where the proportionality constant, or Henry's constant, links concentration in the liquid phase to the gas's partial pressure.

Partial Pressure

Partial pressure refers to the pressure exerted by a single component of a gas mixture, assuming it occupies the whole volume by itself. This concept is crucial when applying Henry's law, as it allows one to determine the relationship between the gas's concentration in solution and its pressure in the atmosphere or another gas mixture.

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