Test Procedure

Before starting the experiment it is essential that the chemical solutions in the flask are fresh and free from pollution. Then, water is filled in the eudiometer jacket and salt water in the aspirator bottle. To expel the residual gases, if any, from the eudiometer, the three-way valve is opened to the atmosphere and the aspirator bottle is raised to fill the eudiometer to the 100 cc mark. The three-way valve is then closed and the valve x is opened. The aspirator bottle is lowered which, in turn, lowers the level of salt water in the eudiometer resulting in the rise in the level of chemical solution in flask a. As soon as the chemical solution touches a mark on the capillary connecting the common header tube, the valve x is closed. The same procedure is repeated for flasks b and c. By doing so, all the residual gases in the flasks are expelled to the eudiometer and the common header. The residual gases from the eudiometer are expelled by opening the single way valve C to the atmosphere and raising the aspirator bottle so that salt water reaches up to the 100 cc mark. The apparatus is now ready for taking readings of flue gases.