PSY100Y5 Lecture Notes - White Gas, John Torrey, Fume Hood
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PSY100Y5 Full Course Notes
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Determination of the atomic mass of metallic element. The atomic mass of a metal can be determined in different ways. Two of these methods are based on the reaction of the metal with aqueous acid: M(s) + n h 3 o (aq) + n/2 h 2 (g) + n h2o. The atomic mass can be determined by either (1) determining the number of moles of h gas produced by a known. 2 weight of metal, or (2) determining the number of moles of h. In this experiment we"ll use the first method. Fill the gas burette with this solution and, wearing a glove, close the open end with your finger and invert the burette in the solution remaining in the beaker. Clamp the burette vertically, with the end immersed just below the surface. Take care that air bubbles are not trapped in the gas burette. The unknown metal was obtained from my ta.
