CHAPTER16

# Table 161 solubility of two inorganic compounds in

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Unformatted text preview: to each other. That is, yi,gas side yi,liquid side or Pi,gas side Pyi,liquid side since yi Pi /P for ideal-gas mixtures. This is known as the Henry's law and is expressed as y i,liquid side Pi,gas side H (1622) Solute Temperature, K 273.15 280 290 300 310 320 330 340 350 360 370 373.15 Salt NaCl 35.7 35.8 35.9 36.2 36.5 36.9 37.2 37.6 38.2 38.8 39.5 39.8 Calcium bicarbonate Ca(HCO3)2 16.15 16.30 16.53 16.75 16.98 17.20 17.43 17.65 17.88 18.10 18.33 18.40 where H is the Henry's constant, which is the product of the total pressure of the gas mixture and the proportionality constant. For a given species, it is a function of temperature only and is practically independent of pressure for pressures under about 5 atm. Values of the Henry's constant for a number of aqueous solutions are given in Table 162 for various temperatures. From this table and the equation above we make the following observations: 1. The concentration of a gas dissolved in a liquid is inversely proportional to Henry's constant. Therefore, the larger the Henry's constant, the smaller the concentration o...
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