Chem lab 4 what a bore

Chem lab 4 what a bore - Experiment 4 Stoichiometry and the...

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Experiment 4: Stoichiometry and the Ideal Gas Law By Chris Bostick Lab Instructor Chris Sgro October 14, 2005
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Results and Discussions: The goal of this experiment was to determine the identity of an unknown nitrite salt (7298), formula MNO 2 where M + is an alkali metal cation. By dissolving nitrite salt in an excess of sulfamic acid, the amount of moles of nitrogen gas can be determined. Using the balanced equation given in the lab manual for the reaction of nitrite salt + sulfamic acid, the moles of N 2 can be stoichiometrically converted into moles of MNO 2 . Using this with the additional information of temperature and pressure inserted into the Ideal Gas Law the unknown salt identity can be solved by taking moles of MNO 2 and finding grams/mol. Balanced Chemical Equation for Reaction of Unknown Nitrite: MNO 2 (aq) + HSO 3 NH 2 (aq) ---- MHSO 4 (aq) + H 2 O(l) + N 2 (g) The procedure for finding moles of MNO 2 was solved by using the Ideal Gas Law PV = nRT, where n is the only unknown, all others were measured during the lab.
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