Lab report 3 - Stoichiometry and the Ideal Gas Law by...

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Stoichiometry and the Ideal Gas Law by Rachel Soffer Lab Instructor: Kaushik Nanda Oct 17, 2007
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Purpose: To determine the identity of an unknown nitrate salt, MNO 2 , (where M + is an alkali metal cation, Li + , Na + , K + , or Rb + ) by dissolving it into H 2 O and reacting it with excess sulfate. Results and Discussion: Nitrate salt # 6313 Volume A 600 mL beaker was used to hold displaced H 2 O. It was filled with enough H 2 O to submerge the tip of the dropper so as not to uptake air and create air bubbles. The original mass of the beaker and water was measured as 443.80g. After the experiment, the mass was 716.00g. The Mass of H 2 O displaced was calculated: 716.00g -443.80g= 272.20g H 2 O displaced Given that at 27.0ºC, the density of H 2 O is 0.9965162g/mL, the volume of water produced was calculated: ( 29 L mL L O gH O mlH O gH 273 . 0 1000 1 9965162 . 0 1 20 . 272 2 2 2 H 2 O displaced Temperature The temperature of the H 2 O in the Erlenmeyer Flask was measured as 27.0ºC (+273 = 300.15 K).
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