Synthesis And Analysis Of Copper (II) Coordination Compound
CHEM 163: SYNTHESIS AND ANALYSIS OF A COPPER(II) COORDINATION COMPOUND
INTRODUCTION
In this multi-week experiment, you will synthesize a compound and then analyze it to determine its empirical formula. The substance you will prepare is a vividly colored coordination compound of copper. Based on the reagents used in the synthesis procedure, you can assume that the final compound contains copper(II), ammonia, sulfate, and water. In your analysis, you goal is to figure out the mole ratio of each component in the final compound. In other words, you will solve for x, y, z and a in the formula Cux(NH3)y(SO4)z • aH2O. Based on the way the formula is written you can assume that ammonia …show more content…
Also, note that you will write descriptive observations for several parts, in addition to collecting quantitative data in data tables. • Respect significant digits in the recording of data and the calculations with that data.
Part I: Synthesis of the Copper(II) Coordination Compound
Safety Concerns: Concentrated ammonia releases caustic and toxic fumes. Work in the fume hood, as much as possible, on all parts involving ammonia.
Waste Concerns: Dispose of all solutions containing copper in the designated waste jar for this lab.
1. Weigh out 10 grams of copper(II) sulfate pentahydrate (CuSO4 • 5H2O) to the nearest centigram, and record the actual mass used. Record your observations of the original compound’s appearance. Place the crystals in a 250 mL beaker.
2. Add about 10-15 mL of water to the solid and then, in a hood, add 20 mL of 15 M NH3 (concentrated ammonia.) Stir to dissolve the crystals, carefully holding the beaker up to the light to see whether crystals still remain.
3. Over a period of 1 minute, slowly add 20 mL of 95% ethanol to the solution. Stir and cool to room temperature. Record your observations of any change that …show more content…
Word-processed sections are in bold.
1. Title: Top of page: Provide the experiment title in YOUR own words (do not use the manual’s title), the date the experiment was performed, and your name first followed by your partner’s name.
2. Introduction and Purpose: Using YOUR own words, interest the reader in the investigation and explain what is being determined, generally how the investigation is conducted, and why this determination is important in the greater sense. Avoid plagiarism by citing information that is not yours.
3. Procedure: Use the following reference:
Loftus, C.; Cabasco-Cebrian, T.; Wick, D. “Laboratory Manual for CHEM 163” spring 2012 Edition, Department of Chemistry, Seattle Central Community College, pp ???
Include the relevant page numbers for the investigation. If you change a given procedure, you must outline, briefly, exactly what was done differently. Websites may be referenced simply, such as www.google.com. You must also put in when the website was last updated.
4.
INTRODUCTION
In this multi-week experiment, you will synthesize a compound and then analyze it to determine its empirical formula. The substance you will prepare is a vividly colored coordination compound of copper. Based on the reagents used in the synthesis procedure, you can assume that the final compound contains copper(II), ammonia, sulfate, and water. In your analysis, you goal is to figure out the mole ratio of each component in the final compound. In other words, you will solve for x, y, z and a in the formula Cux(NH3)y(SO4)z • aH2O. Based on the way the formula is written you can assume that ammonia …show more content…
Also, note that you will write descriptive observations for several parts, in addition to collecting quantitative data in data tables. • Respect significant digits in the recording of data and the calculations with that data.
Part I: Synthesis of the Copper(II) Coordination Compound
Safety Concerns: Concentrated ammonia releases caustic and toxic fumes. Work in the fume hood, as much as possible, on all parts involving ammonia.
Waste Concerns: Dispose of all solutions containing copper in the designated waste jar for this lab.
1. Weigh out 10 grams of copper(II) sulfate pentahydrate (CuSO4 • 5H2O) to the nearest centigram, and record the actual mass used. Record your observations of the original compound’s appearance. Place the crystals in a 250 mL beaker.
2. Add about 10-15 mL of water to the solid and then, in a hood, add 20 mL of 15 M NH3 (concentrated ammonia.) Stir to dissolve the crystals, carefully holding the beaker up to the light to see whether crystals still remain.
3. Over a period of 1 minute, slowly add 20 mL of 95% ethanol to the solution. Stir and cool to room temperature. Record your observations of any change that …show more content…
Word-processed sections are in bold.
1. Title: Top of page: Provide the experiment title in YOUR own words (do not use the manual’s title), the date the experiment was performed, and your name first followed by your partner’s name.
2. Introduction and Purpose: Using YOUR own words, interest the reader in the investigation and explain what is being determined, generally how the investigation is conducted, and why this determination is important in the greater sense. Avoid plagiarism by citing information that is not yours.
3. Procedure: Use the following reference:
Loftus, C.; Cabasco-Cebrian, T.; Wick, D. “Laboratory Manual for CHEM 163” spring 2012 Edition, Department of Chemistry, Seattle Central Community College, pp ???
Include the relevant page numbers for the investigation. If you change a given procedure, you must outline, briefly, exactly what was done differently. Websites may be referenced simply, such as www.google.com. You must also put in when the website was last updated.
4.