Experiment 9 Lab Report - Determining the Synthesis of...

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Determining the Synthesis of Malachite and Verdigris LABORATORY WRITTEN REPORT OBJECTIVE The purpose of this experiment is to perform synthetic reactions as provided in a primary journal article, document observations of chemical reactions, and separate a precipitate using a common laboratory technique. EXPERIMENTAL METHOD Materials All materials necessary were provided by the Virginia Tech Department of Chemistry. Synthesis Part A: Malachite Synthesis A copper solution was made by using 12.5 mL of distilled water and 3.10 g of hydrated copper sulfate. The solution was stirred well using a magnetic stir plate. Separately, 25 mL of DI water was mixed with 1.45 g of sodium carbonate. The carbonate solution was slowly added to the copper solution in a 250 mL beaker. The resulting carbonate solution was then left to stand in an ice bath for 30 minutes. After, the solution was filtered by gravity. Part B: Verdigris Synthesis Step 1: A copper solution was made by using 4.20 g of hydrated copper sulfate and 50 mL of DI water. The solution was stirred well using a magnetic stir plate. While the copper solution was being stirred, 17.8 mL of ammonia was added drop wise using a plastic pipette. The mixture was stirred for 5 minutes and the solid precipitate of the copper solution was collected by vacuum filtration using a Büchner funnel with filter paper. Step 2: In a 150 mL beaker, the damp precipitate was mixed with 40 mL of DI water. Then, 8.5 mL of 2.0 M sodium hydroxide was rapidly poured into the stirring copper solution. The solution was then filtered using vacuum filtration, which resulted in a precipitate of copper hydroxide.
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