Table 1: Solubility of CO2 at a partial pressure for CO2 of 1 bar abs[3]. HSC Chemistry Data Sheet; Chemistry Syllabus (2017->) More gas is present in a solution with a lower temperature compared to a solution with a higher temperature. The solubility of carbon dioxide in pure water in the presence of CO2 gas hydrate has been measured at temperatures between 273 and 284K and pressures ranging from 20 to 60bar. I took 50 mL of carbonated water at different temperatures and then I titrated that with sodium hydroxide solution. The variation of solubility for a gas with temperature can be determined by examining the graphic on the left. Thus, the solubility of carbon dioxide in water is dependent on temperature, concentration and pressure. The indicator I used was phenolphthalein with an endpoint of 8.3 pH. As the temperature increases, the solubility of a gas decrease as shown by the downward trend in the graph . The solubility is given for "pure water", i.e., water which contain only CO 2. In geothermal fluids, significant amounts of carbon dioxide may exist at reservoir pressure and temperature conditions . The concentration of carbon dioxide (CO 2) in ocean water (y axis) depends on the amount of CO 2 in the atmosphere (shaded curves) and the temperature of the water (x axis). Temperature Dependence As with other gases, the solubility of carbon dioxide in water decreases as the temperature … I did a lab where I tested the solubility of carbon dioxide in water at different temperatures. The solubility of CO2 is temperature dependent, as shown in Table 1: Solubility of CO2 at a partial pressure for CO2 of 1 bar abs[3]. Temperature (oC) 0 10 20 30 40 50 80 100 Solubility (cm3 CO2/g water) 1.8 … Because the concentration of dissolved carbon dioxide is set by Henry's Law, we can use this to determine the concentration of protons and bicarbonate ion in water. ‡ Second column of table indicates solubility at each given temperature in volume of CO 2 as it would be measured at 101.3 kPa and 0 °C per volume of water. Solubilities of Gases in Water : Methane, oxygen, carbon monoxide, nitrogen, and helium all have different solubilities in water, but all of them become less soluble with increasing temperature. For example, at 25 °C the pH of 3.9 is expected (see carbonic acid). As the forward reaction is exothermic, a decrease in temperature causes the system to move in the forward direction. The solubility of calcium carbonate in water has been published in different sources at room temperature and higher temperatures , . 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