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Experiment 3 lab report

# Experiment 3 lab report - Experiment#3 A sequence of...

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Experiment #3: A sequence of Chemical Reactions Experiment by: Jaimin P and Heba A September 11, 2009 Introduction: The purpose behind this experiment is to find an accurate mass of copper. We start with Cu(NO 3 ) 2 and will eventually end up with just copper. According to the law of conservation mass, the element of copper is neither created nor destroyed so theoretically we will recover the copper that we put in the solution to begin with. After we have recovered the copper, we will have to find the percent yield in the solution. The formulas we will be using in this experiment are: Percent yield = actual mass or moles / theoretical mass or moles Theoretical mass = volume x concentration x [1mol Cu/1mol Cu(NO 3 ) 2 ] x molecular mass of Cu Mass of Cu = Mass of Beaker with Cu – Mass of Beaker Procedure: 1. Gather all materials. 2. In a beaker, add 25mL of Cu(NO 3 ) 2 . Find and record the Morality concentration of the Cu(NO 3 ) 2. 3. Add NaOH in the beaker with Cu(NO 3 ) 2 (equation 1) . Stir until there is “chunky” material left. 4. Test the acidity of the solution by pouring a drop on the Litmus paper. If the paper is pink to start with and turns blue, the solution is acidic.

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