CHEM 162 EXPERIMENT #5: SPECTROCHEMICAL SERIES
Goals Of This Lab:
• Produce A Copper Coordination Compound And Evaluate The Yield
• Calculate D-Orbital Splitting Energies From Spectral Data In Nanometers
• Apply Crystal Field Theory To The Comparison Of Ligand Field Strengths Among
Groups Of Coordination Complexes
• Assess The Accuracy Of Experimental Data And Identify Sources Of Error
Your Lab Report Will Be Graded On The Following Criteria Using A Poor/Good/Excellent
Rating System:
• Calculations Are Complete Are Accurate, With Proper Use Of Significant Figures And Units
• Data Collected Is Reasonable
• Lab Report Is Clear, Legible, And Neat
• Error Analysis Is Well-Supported And Valid
By Signing Below, You Certify That You Have Not Falsified Data, That You Have Not
Plagiarized Any Part Of This Lab Report, And That All Calculations And Responses
Other Than The Reporting Of Raw Data Are Your Own Independent Work. Failure To
Sign This Declaration Will Result In 5 Points Being Deducted From Your Lab Score.
Signature: Nick
This Lab Is Worth 60 Points: 10 Points For Notebook Pages, 50 Points For The Lab Report.
(Do Not Include Your Notebook Pages When You Scan Your Report For Upload Into Gradescope.)
Laboratory Waste Evaluation
Laboratory waste is considered anything generated during an experiment that is disposed of down the sewer drain,
thrown in the garbage, collected in a container for disposal by the UW Environmental Health & Safety department, or
released into the environment. Based on the written lab procedure and your actions during the lab, list the identity
and approximate amount (mass or volume) of waste that you generated while performing this experiment.
- ~0.25 g NH2CH2CO2H
- ~0.5 g CuSO4*5H2O
- ~1L DI water
- ~2 filter paper
- ~20 mL copper complexes
- ~10 mL iron complexes
- ~6 mL cobalt complexes
- ~4 papertowels
- ~5 kim wipes
1 of 5
, Name: Student Id #:
Part A: Preparation Of Cis-Bis(Glycinato)Copper(Ii) Monohydrate, Cu(Gly)2 ·H2 o
Mass Cuso 4·5h 2o 0.4990 G
Mass Nh 2ch2co2h (Glycine) Molar 0.2470
Mass Cuso 4·5h 2o Moles 249.70 G
Cuso 4·5h 2o 0.001998 G/Mol
Molar Mass Nh 2ch 2co 2h (Glycine) 75.070 e
Moles Nh 2ch 2co 2h (Glycine) 0.003290 Moles
Limiting Reagent Is glycine G/Mol
Molar Mass Cu(Gly)2·H 2o 229.70 e
(Note For Molar Mass: Each Glycine Loses The Acidic Proton In Order To Be A Bidentate Ligand)
Mass Cu(Gly)2·H 2o Expected Based On Limiting Reagent Mass 0.3779 Moles
Cu(Gly)2·H 2o Recovered 0.3290
% Yield 87.06 G/Mole
G
G
%
Discuss your % yield. It is high or low? What are the contributing factors to this high or low %
yield?
% yield = (experimental / theoretical) * 100 => (0.3290 g/ 0.3779 g) * 100 = 87.06% yield
The percent yield was slightly lower, this may have been caused by adding too little of sodium
bicarbonate or accidentally rinsing the precipitate with water.
2 of 5
Goals Of This Lab:
• Produce A Copper Coordination Compound And Evaluate The Yield
• Calculate D-Orbital Splitting Energies From Spectral Data In Nanometers
• Apply Crystal Field Theory To The Comparison Of Ligand Field Strengths Among
Groups Of Coordination Complexes
• Assess The Accuracy Of Experimental Data And Identify Sources Of Error
Your Lab Report Will Be Graded On The Following Criteria Using A Poor/Good/Excellent
Rating System:
• Calculations Are Complete Are Accurate, With Proper Use Of Significant Figures And Units
• Data Collected Is Reasonable
• Lab Report Is Clear, Legible, And Neat
• Error Analysis Is Well-Supported And Valid
By Signing Below, You Certify That You Have Not Falsified Data, That You Have Not
Plagiarized Any Part Of This Lab Report, And That All Calculations And Responses
Other Than The Reporting Of Raw Data Are Your Own Independent Work. Failure To
Sign This Declaration Will Result In 5 Points Being Deducted From Your Lab Score.
Signature: Nick
This Lab Is Worth 60 Points: 10 Points For Notebook Pages, 50 Points For The Lab Report.
(Do Not Include Your Notebook Pages When You Scan Your Report For Upload Into Gradescope.)
Laboratory Waste Evaluation
Laboratory waste is considered anything generated during an experiment that is disposed of down the sewer drain,
thrown in the garbage, collected in a container for disposal by the UW Environmental Health & Safety department, or
released into the environment. Based on the written lab procedure and your actions during the lab, list the identity
and approximate amount (mass or volume) of waste that you generated while performing this experiment.
- ~0.25 g NH2CH2CO2H
- ~0.5 g CuSO4*5H2O
- ~1L DI water
- ~2 filter paper
- ~20 mL copper complexes
- ~10 mL iron complexes
- ~6 mL cobalt complexes
- ~4 papertowels
- ~5 kim wipes
1 of 5
, Name: Student Id #:
Part A: Preparation Of Cis-Bis(Glycinato)Copper(Ii) Monohydrate, Cu(Gly)2 ·H2 o
Mass Cuso 4·5h 2o 0.4990 G
Mass Nh 2ch2co2h (Glycine) Molar 0.2470
Mass Cuso 4·5h 2o Moles 249.70 G
Cuso 4·5h 2o 0.001998 G/Mol
Molar Mass Nh 2ch 2co 2h (Glycine) 75.070 e
Moles Nh 2ch 2co 2h (Glycine) 0.003290 Moles
Limiting Reagent Is glycine G/Mol
Molar Mass Cu(Gly)2·H 2o 229.70 e
(Note For Molar Mass: Each Glycine Loses The Acidic Proton In Order To Be A Bidentate Ligand)
Mass Cu(Gly)2·H 2o Expected Based On Limiting Reagent Mass 0.3779 Moles
Cu(Gly)2·H 2o Recovered 0.3290
% Yield 87.06 G/Mole
G
G
%
Discuss your % yield. It is high or low? What are the contributing factors to this high or low %
yield?
% yield = (experimental / theoretical) * 100 => (0.3290 g/ 0.3779 g) * 100 = 87.06% yield
The percent yield was slightly lower, this may have been caused by adding too little of sodium
bicarbonate or accidentally rinsing the precipitate with water.
2 of 5
