chem 110-02 expt. _8 lab

chem 110-02 expt. _8 lab - place were as follows: when we...

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Katie Stonesifer Chem 110-102 Sept, 30 2009 Team: John C. General Chemistry 1 Experiment # 8: Synthesis and Limiting Reactant
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Introduction: In this lab we took Nickel Chloride and water, known as the hydrate reactant, and precipitated it with ethylenediamine. This allowed us to find out which chemical was the limiting reactant in the equation NiCl 2 x 6H 2 0 + 3C 2 H 8 N 2 Ni(C 2 H 8 N 2 ) 3 Cl 2 + 6H 2 O If there are more than 3 mol’s of C 2 H 8 N 2 per 1 mole of NiCl 2 x 6H 2 0 then the C 2 H 8 N 2 is present in excess and therefore, NiCl 2 x 6H 2 0 is the limiting reactant. If we need more than the available moles of C 2 H 8 N 2 than Nickel Chloride is the limiting reactant. Questions: 1) The observations that took place that led us to believe a chemical reaction took
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Unformatted text preview: place were as follows: when we mixed the green granulated NiCl 2 with the C 2 H 8 N 2 the mixture turned dark blue than purple. When the acetone was added it became slushy, and turned light purple. The beaker with the mixture became warm. These observations are key factors in a chemical reaction. 2) Our % yield was 77% which is 23% off, this was probably so far off due to incorrect measuring, and we had a small spill during the exchange of chemicals. Specifically, when we added acetone in 5 mL increments, some product was lost....
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chem 110-02 expt. _8 lab - place were as follows: when we...

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