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Limiting Reactant Lab Report

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CHEM 122 – General Chemistry I Laboratory Name: Evalyne Kogi Section DM1 Name of Partner: Negin Soleimani Spring 2017 Instructor: Prentice Date of submission: 3/20/17 Experiment #5: SYNTHESIS OF TRIS NICKLE (II) CHLORIDE Abstract: We found the limiting reactant by calculating the number of moles of Tris based on moles of HYD used (0.00260) and number of moles of Tris based of moles of En(0.0032). Because the number of moles of tris based on moles of HYD used resulted to be a lower value than the number of moles of Tris based on moles of En used, we concluded that HYD is the limiting reactant in our reaction. Introduction: We were to synthesize a nickel (II) complex and then apply reaction stoichiometry to determine the percentage yield. The goal at the end of this experiment is to identify the limiting reactant, determine the theoretical and percent yield and prepare a complex compound. The synthesis reaction studied in this experiment is represented by the balanced equation: NiCl2.6H2O(s)+3H2NCH2CH2NH2(aq)[Ni(H2NCH2CH2NH2)3(s)+6H2O(l) equation 1 Hydrate …show more content…

In this experiment, all reactants used together with the complex product are water soluble. The reaction first takes place in de-ionized water. Acetone is used in the experiment to precipitate out the Ni (en) 3CL2 which is less soluble than the acetone/water mixture. It’s important that we used a minimal amount of water because otherwise the solid would have dissolved too quickly and a chemical reaction would have withheld. Ethylenediamine is a colorless liquid that was also used which allowed the first chemical reaction to occur; changing the solution from a green to deep purple

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