Stoichiometry - Stoichiometry & Ideal Gas Law Lab...

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Lab Instructor: Xiaoxiao Li October 18, 2007
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An unknown nitrate salt was reacted with sulfamic acid to identify the identity of the unknown nitrate salt according to the equation below where M is the unknown metal cation of the nitrate salt: MNO 2 (aq) + H 3 SO 3 NH 2 (aq) → MHSO 4 (aq) + H 2 O(liq) + N 2 Upon knowing the moles of N 2 , which are stoichiometrically related to the moles of MNO 2 , the number of moles of MNO 2 originally present was calculated and coupled with the known mass of the salt, the molecular mass and thus identity of M were calculated. Mass of Unknown 1307 Nitrate Salt: 17.613 g Mass of empty bottle: - 16.417 g 1.196 g Moles of Nitrogen Gas Produced: PV = nRT n = PV RT Determination of T: Temperature of the gas was assumed to equal the temperature of the liquid products. T = 23 ° C + 273.15 = 296.15 K Determination of P: P Barometric = P TOT = P water + P gas P water at 23 ° C (temp measured with a thermometer) = 21.07 mmHg
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This lab report was uploaded on 04/18/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

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Stoichiometry - Stoichiometry & Ideal Gas Law Lab...

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