NAME: Anh-Khoa Duong STUDENT ID #: 1960254

QUIZ SECTION: CI

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

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.)

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NAME: STUDENT ID #:

Part A: Preparation of cis-Bis(glycinato)copper(II) monohydrate, Cu(gly)2

·H2O

mass CuSO4

·5H2O g

mass NH2CH2CO2H (glycine) g

molar mass CuSO4

·5H2O g/mole

moles CuSO4

·5H2O moles

molar mass NH2CH2CO2H (glycine) g/mole

moles NH2CH2CO2H (glycine) moles

limiting reagent 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 reagent g

mass Cu(gly)2

·H2O recovered g

% Yield %

0.003290

glycine

0.3779

0.3290

87.06

229.70

0.4990

0.2470

249.70

0.001998

75.070

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.

Note: the molecular formula for

the complex will give you

information about the reaction

stoichiometry for determining

the limiting reagent.

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