   Chapter 13.5, Problem 2.3ACP

Chapter
Section
Textbook Problem

What is the solubility of CO2 in water at 25 °C when the pressure of the gas is 3.7 × 10−4 bar?

Interpretation Introduction

Interpretation: The solubility of CO2 in water at 250C has to be calculated if the pressure of the gas is 3.7×10-4bar.

Concept introduction:

Henry’s law: The solubility of a gas in liquid is directly proportional to the gas pressure.

Sg= kHPg,where,Sgisthegassolubility(inmol/kg)kHis Henry's constant Pg is the partial pressure of the gaseous solute.

Explanation

Given data:

partialpressureofCO2=3.7×10-4barHenry'sconstant=0.034mol/kg.bar

According to Henry’s law:

Sg =kHPg

Substituting the given values in the above equation, the solubility can be calculated.

Sg=0

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