Stoichiometry of a reaction

Stoichiometry of a reaction - Stoichiometry of a reaction...

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Stoichiometry of a reaction September 18, 2007 Lab Section 2325 Course Number T.A. Carly Ebben Michael Kowalski Kyle Poplawski Kelly Kluckman Purpose- In class we have learned how to balance chemical reactions using stoichiometry. Without products however a reaction can’t be balanced. We can, however, experimentally determine the stoichiometry ratio. This experimental knowledge of stoichiometric coefficients is a great key for predicting possible products of a reaction. Procedure- Four different determination methods were used in this experiment. The calibration using a Beral Pipet was taken of every solution used. Drops were counted of each solution until 1 ml was reached. Job’s method was first. A Beral Pipet was used to fill nine wells in a 24 well plate according to the volumes in table 1. The mixture was mixed well and was left alone for 2 to 3 minutes. 2-3 drops of Alizarin Yellow R solution was put into A1-A6/B1-B3 wells. The colors were then recorded. Pink indicated excess hydroxide. Excess Nickel was then tested for. 2-3 drops of DMG solution was added to wells C1-C6/D1-D3. The solution was stirred and color was recorded. Pink indicated excess nickel. Determination 2- The above procedure was repeated however using .20 M Ni(NO3)2 and .10 M NaOH. Mole Ratio Method- A Beral Pipet was used to fill nine wells in a 24 well plate according to the volumes given in table 2. The mixture was stirred and left to sit for 2-3 minutes. Excess hydroxide was then tested for. 2-3 drops of Alizarin Yellow R solution was added to wells A1-
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A6/B1-B3. Pink precipitate indicates excess hydroxide. 2-3 drops of DMG were added to wells
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This lab report was uploaded on 04/08/2008 for the course CHEM 1 taught by Professor Wilkie during the Fall '08 term at Marquette.

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Stoichiometry of a reaction - Stoichiometry of a reaction...

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