Stoichiometry and the Ideal Gas Law copy

Stoichiometry and the Ideal Gas Law copy -...

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Results and Discussion: The purpose of this lab was to determine the identity of an unknown nitrite salt (#1318). The reaction between a known mass of the salt and sulfamic acid was carried out so that the nitrite salt could be determined. MNO 2 (aq) + HSO 3 NH 2 (aq) MHSO 4 (aq) + H 2 O(l) + N 2 (g) The data obtained during the experiment is shown in Table 1: Table 1: Mass of empty 600 mL beaker 188.2 g Mass of 600 mL beaker and displaced H 2 O 629.7 g Mass of unknown salt 1.441 g Temperature of system 21.9 º C Barometric Pressure 758.9 mmHg To calculate the moles of the nitrite salt used, the moles of nitrogen produced were determined using the ideal gas law, which is PV=nRT. From the experimental data, several of the values in this equation can be easily determined. To determine the value of the pressure of the nitrogen gas, Dalton’s law of partial pressures is used. P total = P H20 + P N2 758.9mmHg = 19.83mmHg + P N2 P N2 = 739.07 mmHg The mass of the water that was displaced was:
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This note was uploaded on 10/31/2008 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 and the Ideal Gas Law copy -...

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