Chemlab6 - Stoichiometry and the Ideal Gas Law By Matthew...

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Stoichiometry and the Ideal Gas Law By: Matthew Schoifet Lab Instructor: Mike Coleman October 19, 2009
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Purpose: The purpose of this lab was to identify an unknown nitrite salt using the ideal gas law and stoichiometry. The unknown nitrite salt in the form MNO 2 where M + is an alkali metal was reacted with sulfamic acid to produce nitrogen gas. Using the volume, temperature, and pressure of the nitrogen gas, the moles of the nitrogen gas was to be calculated using the Ideal Gas Law. The moles of nitrogen gas were to be used to determine the moles of the nitrite salt and consequently the identity of the alkali metal. Procedure: First an apparatus consisting of an Erlenmeyer flask, a Florence flask, and a large beaker was set up by connecting them with rubber tubing. The Florence flask was filled with water and the system was checked to be airtight. Using a pipette bulb the rubber tubing was filled with water and checked to make sure no air bubbles were in it. Once the apparatus was set up 25.0 mL of sulfamic acid was distilled with 65.0 mL of distilled water and poured into the Erlenmeyer flask. The nitrite salt was then obtained and massed along with other objects needed for calculations. Table 1: Mass of Materials Material Mass (g) 600 mL beaker 192.697 Test tube 3.542 Unknown nitrite salt 1.252 The nitrite salt was placed in the test tube and mixed with 3 mL of distilled water. The test tube
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