Lab 27: Identifying an Unknown Metal Abstract
The purpose of this lab is to determine how a reaction between an unknown metal and an acid be used to identify the metal. To do this, hydrogen chloride is reacted with the unknown metal in a flask that is submerged in a water bath. The hydrogen formed from this experiment can be collected and be calculated from its pressure, volume and temperature. The Ideal Gas Law then can be used to calculate the number of moles of hydrogen. The number of moles of hydrogen is applied with the possible stoichiometric ratio, to be able to calculate the atomic weight for the unknown metal. This is done three times in order to have precise results. Using the atomic weight we can expect to be able to match it to a metal on the periodic table, which demonstrates the same properties as the unknown metal that was reacted with hydrogen. These results are important because if the calculations or the ratios of hydrogen are off, the identity of the unknown metal will be wrong.