CHM110H5 Lecture Notes - Lecture 2: Atmospheric Pressure, Oxidation State, Ammonium Chloride
Document Summary
Behaviour of gasses: determination of the atomic mass of a metallic element and graham"s. In the first part of this experiment the purpose was to determine the identity of an unknown metal that reacted completely with an aqueous acid. This was achieved through conducting an experiment in which the changes in pressure and volume of the liquid solution and the hydrogen gas being formed were observed. After the unknown metal was placed in hydrochloric acid, the moles of h2 gas produced were used to determine the atomic mass of the metal. Specifically, the number of moles of the unknown metal were calculated by using/balancing the following equation: Through the use of stoichiometry and molar ratios, the moles of the unknown metal were solved. Then by substituting known values for the unknown metal, such as mass and moles, into the following equation revealed the atomic mass consequently identifying the metallic element.
