On the Source of the Solubility Error of Carbon Dioxide in Water
Research on the solubility of carbon dioxide in water, the generation of the error is not one end.

The first to bear the brunt, the deviation of the instrument measurement. The precision of the measuring instrument is related to the accuracy of the data. If the scale of the measuring cup and the burette is poor, how can the number of the measured volume be true? That is, if the water sample with dissolved carbon dioxide is measured, a slight difference in the scale will make it impossible to calculate the solubility in the final calculation.

The second time is the disturbance of environmental variables. Temperature and pressure have a huge impact on the solubility of carbon dioxide. During the experiment, the temperature may fluctuate, but it cannot be constant. Although the change is tiny, the solubility of carbon dioxide in water changes accordingly. And the air pressure is not constant, the location is high and low, and the air pressure varies from day to night. If the experiment is not carefully observed and controlled, the results obtained are correct?

Furthermore, the operation method is improper. Dissolve carbon dioxide in water, the rate of transfer is uneven, or the time is not suitable, all resulting in dissolution not reaching equilibrium. When filtering and separating, if the operation is slow, the carbon dioxide escapes, and the measured solubility must not be its original number.

There is a problem with the purity of the reagent. If the water used contains impurities, it may be phased with carbon dioxide or prevented from dissolving. If the carbon dioxide used is impure and mixed with other gases, it will also dissolve in water.

All of these are the sources of errors in the solubility of carbon dioxide in water. To obtain accurate numbers, you must be careful about the calibration of the instrument, the change of the environment, the method of operation, and the purity of the reagents carefully selected in order to approach the true number and avoid errors.