EXP 14 procedure - First MeasureNet needs to be set up for...

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A Guide to Computer User Support for Help Desk and Support Specialists
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Chapter 10 / Exercise 11
A Guide to Computer User Support for Help Desk and Support Specialists
Beisse
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First MeasureNet needs to be set up for emission spectroscopy. After obtaining and cleaning a Bunsen burner, collect the river water sample. Pour a small amount of the river water onto a watch glass, hold the watch glass close to the intake of the burner, and dip a clean/hot nichrome wire into the sample. Observe the flame caused by the sample splashing into the intake and record the color of the flame. Save the recorded wavelength on the MeasureNet workstation and compare it to data from experiment 10 to determine if which Group IA or IIA ions are present.Prepare 5 dilutions of the Fe/Cu solution, which contains 400 ppm Cu2+ and 20 ppm Fe3+, transferring each to a cuvette and without going below 50 ppm Cu2+. Set up the MeasureNet workstation to record absorption spectroscopy data. Fill three additional cuvettes, one with 0.1 M Iron(III) nitrate solution, one with 0.1 M copper(II) nitrate solution, and the last with the river water sample. Sample, record and save the absorption spectrum for each of the 8 samples. Create a scatter plot for the 0.1M solutions and determine, then record a max wavelength for Fe3+ and Cu2+. Record concentrations and corresponding absorbance of each dilution, and the lake water sample, at the max wavelength for Fe3+ and Cu2+. Generate a Beer-Lambert plot, then a trend line. Use the equation for the trend line to solve for the concentration of Fe3+ and Cu2+ in the lake water sample.Experiment:Caution: Use extreme precaution when handling these chemicals. They can be dangerous to your health. Where safety goggles at all times and allow chemicals to contact skin or any part of body. Be careful when working around fire. Do not hold any body part over the open flame. Also do not breathe in fumes emitted by any of the chemicals.Part One1) First you must set up the MeasureNet workstation provided for you at your Lab table. To do this, you must first press On/Off. Then press Main Menu, F5 Spectroscopy, and F1 Emission(in that order). Press SetUp, then F1 to set up the limits for the scan. Set the X axis(wavelength) at default setting and for the Y axis(intensity) set the maximum to 1500.
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A Guide to Computer User Support for Help Desk and Support Specialists
The document you are viewing contains questions related to this textbook.
Chapter 10 / Exercise 11
A Guide to Computer User Support for Help Desk and Support Specialists
Beisse
Expert Verified

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