EBK A SMALL SCALE APPROACH TO ORGANIC L
EBK A SMALL SCALE APPROACH TO ORGANIC L
4th Edition
ISBN: 9781305446021
Author: Lampman
Publisher: CENGAGE LEARNING - CONSIGNMENT
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A: we know, pAg =Ā  -log[Ag+]. so with increasing the concentration of reagents,pAg decreases. Option Cā€¦
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A: Planar structure extraction from point clouds is an important process in many applications.
Q: It's important to mark the solvent front with a pencil after the plate is finished being developedā€¦
A: It's important to mark the solvent front with a pencil after the plate is finished being developedā€¦
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Q: What is the Rf value for a compound if it moves 3.0 cm from the origin when the initial spot isā€¦
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Q: Report the R value of the best-fit line for the Calibration Curve
A: R-squared is a statistical measure of how close the data are to the fitted regression line. It isā€¦
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Q: If a spot travels 2.3 cm while the mobile phase travels 6.6 cm, what is the Rf value of theā€¦
A: Given: Distance travelled by spot = 2.3 cm Distance travelled by mobile phase = 6.6 cm
Q: In reverse phase chromatography which analyte will elute first, most polar or least polar?
A: In reverse phase chromatography, polar solvent is used as a mobile phase.
Q: Explain how the charged aerosol detector used
A: Charged aerosol detector: The detector, which is used to detect (measure) the amount of chargedā€¦
Q: Why should you not use a ballpoint pen when marking a TLC plate and why does the horizontal lineā€¦
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Q: Why is splitless injection used with purge and trap sample preparation?
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Q: Explain how solid-phase microextraction works. Why is cold trapping necessary during injection withā€¦
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Q: Which is more polar, the water solvent or the chromatogrphy paper?
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Q: What are the possible reasons why there are no spots on the Developed Plate after analysis?
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Q: How does temperature, flow rate of carrier gas, boiling point and column suupport affect gasā€¦
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Q: if air can degrade a column and cause TC detector filaments to burn out, why do we use an air peak?
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A: An orange compound was added to the top of a chromatography column. The solvent was addedā€¦
Q: Why should the syringe be removed from the sensor when setting the initial volume for each trial?
A: Option C
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Q: What are possible sources of loss in an extraction experiment?
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Q: What property determines which layer is on top or bottom in an extraction?
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Q: A student spots an unknown sample on a TLC plate. A single spot with an Rf of 0.55 showed up on theā€¦
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Q: what will produce a smaller Rf value if the solvent and paper are both changed?
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Q: Why must the spots be above the level of the development solvent in the developing chamber?
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Question

What error is introduced into the determination of an Rf value if the top is left off the developing chamber?

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  • Give the advantages and disadvantages of sequential injection analyzers compared to traditional flow Injection analyzers.
    what will produce a smaller Rf value if the solvent and paper are both changed?
    At the completion of the experiment, a student measures the solvent front to be 55 mm from the baseline. If a component in the sample being analyzed generates a spot whose diameter spans from 34 to 36 mm from the baseline, calculate the Rf value for that component.
  • a pigment in the thin layer chromatography traveled beyond or farther than the solvent front. Therefore, the Rf value of that certain pigment is greater than 1.Ā  What does this mean to the experiment?
    if air can degrade a column and cause TC detector filaments to burn out, why do we use an air peak?
    What is the Rf value for a compound if it moves 3.0 cm from the origin when the initial spot is developed and the solvent front is 12.0 cm from the origin?
  • If a spot travels 2.3 cm while the mobile phase travels 6.6 cm, what is the Rf value of the substance in the spot? What is the mobile phase used and stationary phase used in this lab?
    It's important to mark the solvent front with a pencil after the plate is finished being developed in order to calculate an Rf. Group of answer choices True False
    Does the amount of radiation (cpm) increase or decrease as the distance between the sorce and the sensor increases? Explain
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