Copper II Phosphate Trihydrate Lab Report

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Purpose: The purpose of our experiment was to precipitate Copper (II) Phosphate Trihydrate and determine percent yield, also to react an aqueous solution of Copper (II) Chloride with aqueous Sodium Phosphate and describe the reaction.

Procedure: To conduct our experiment 10 milliliters of CuCL2 and 8 milliliters NaPO4 was added to its own 50 milliliter beaker. These solutions were then combined in a 150 milliliter beaker and mixed for 1 minute. The PH of the mixed solution was checked to see if it was accurate enough to go on with the experiment. The solution was then filtered using the vacuum filtration technique. The precipitate from the filtration with the filter paper was put onto a watch glass. The watch glass with the precipitate was then transferred to the oven. After 20 minutes the watch glass was removed from the oven and weighed. The watch glass was then put back in the oven and the step was repeated twice.

Data:
Data Table 1: Determining Percent Yield of the Product

Calculations:

Moles of reactant
…show more content…
The maximum amount of product that can be determined from an experiment is called the limiting reagent, this is because this reagent runs out first. In our lab the amount of Cu3(PO4)2 was determined from the amount of CuCl2 in the reaction. When CuCl2 ran out no more Cu3(PO4)2 could be produced. The theoretical Yield is found by calculating the maximum amount of product the limiting reagent can produce. The theoretical yield in our experiment was .304 grams, we calculated this value using stoichiometry from the the following equation:2 Na3PO4 + 3 CuCl2 → Cu3(PO4)2 + 6 NaCl .Since we preformed this experiment in a lab and the conditions were not perfect it was impossible to obtain the correct theoretical yield, that we expect when we combine the two reagents. Because of this the weight of the Cu3(PO4)2 that we get in the lab is called the actual

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