Ideal Gas Law for analysis. Preliminary chemical analysis of the metal found it to be trivalent and reactive with strong acids. Henry, a laboratory analyst, took 0.194 g of the metal to determine its identity using the ideal gases experiment. The results of the experiment are reported as follows in his lab notebook: An archaeologist found a chunk of metal and send it to a chemical laboratory Determination of Unknown Metal Using Ideal Gas Experiment mass of unknown metal: 0.194 g barometric pressure (Pbar ): 745 torr Pressure of water vapor: 26.7 torr Temp.: 27 °C Volume of trapped gas: 148 ml height difference of water levels: 11.29 cm A. What is the pressure, in torr, of the dry gas? B. How much moles of hydrogen gas are produced by the reaction? Assuming that the strong acid was in excess. C. What is the identity of the unknown metal M? Assume that the metal is pure. Show your solution.
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
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