Exam (elaborations)
CHEM 162 Experiment #5: Spectrochemical Series
- Course
- Institution
CHEM 162 Experiment #5: Spectrochemical Series
[Show more]
Seller
Follow
Ethanhope
Reviews received
Content preview
[Type here]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
This study source was downloaded by 100000839495789 from CourseHero.com on106-07-2022
of 13:24:55 GMT -05:00
https://www.coursehero.com/file/71695947/Experiment-5-Chem-162-AKNDpdf/
, [Type here]
NAME: STUDENT ID #:
Part A: Preparation of cis-Bis(glycinato)copper(II) monohydrate, Cu(gly)2·H2O
mass CuSO4·5H2O 0.4990 g
mass NH2CH2CO2H 0.2470
g
(glycine) molar mass 249.70
g/
CuSO4·5H2O moles 0.00199
8 mole
CuSO4·5H2O
75.070 moles
molar mass NH2CH2CO2H (glycine)
0.00329 g/mol
0
moles NH2CH2CO2H
e the reaction stoichiometry for d
Note: the molecular formula for the complex will give you information about
glycine
(glycine) limiting reagent
moles
is
molar mass Cu(gly)2·H2O
g/mole
(Note for molar mass: each glycine loses the acidic proton in order to be a bidentate ligand)
mass Cu(gly)2·H2O expected based on limiting 0.3779
g
reagent mass Cu(gly)2·H2O recovered 0.3290
g
% Yield 87.06
%
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.
This study source was downloaded by 100000839495789 from CourseHero.com on206-07-2022
of 13:24:55 GMT -05:00
https://www.coursehero.com/file/71695947/Experiment-5-Chem-162-AKNDpdf/
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Ethanhope. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76658 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now