Answered: Three factors were studied: reactor…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Three factors were studied: reactor length, carrier flow rate, and sample volume, with the high and low values summarized in the following table.

factor	high (+1) level	low (–1) level
X: reactor length	1.3 cm	2.0 cm
Y: carrier flow rate	1.6 mL/min	2.2 mL/min
Z: sample volume	100 μL	150μL

The authors determined the optimum response based on the greatest sensitivity, as determined by the change in potential for the potentiometric detector. The following table summarizes their optimization results.

run	X*	Y*	Z*	ΔE (mV)
1	–1	–1	–1	37.45
2	+1	–1	–1	31.70
3	–1	+1	–1	32.10
4	+1	+1	–1	27.30
5	–1	–1	+1	39.85
6	+1	–1	+1	32.85
7	–1	+1	+1	35.00
8	+1	+1	+1	32.15

Which factor has the greatest effect on sensitivity (change in potential at the detector)?
Which set of conditions optimizes the detection sensitivity?

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