Column chromatography - Study guides, Class notes & Summaries
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FA Exam 3 UPDATED ACTUAL Questions and CORRECT Answers
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FA Exam 3 UPDATED ACTUAL 
Questions and CORRECT Answers 
What are the principal differences between HPLC and other column chromatography 
procedures? - CORRECT ANSWER- Pressure applied to column forcing liquid mobile 
phase at a very high rate. Requires special pumps and stationary phase. 
What advantages does HPLC have of GC? - CORRECT ANSWER- Improvement in 
resolution, speed of separation (much faster), Analyze non volatiles (most important), 
extremely versatile, can often obtain additi...
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CHEM 241 Quiz And Review Questions Correct Answers Latest Update
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What is the maximum amount of time a specific solute band will spend in the mobile phase of a chromatography column? - correct answers tm 
 
Which of the following is NOT an advantage of the use of OPEN TUBULAR columns (capillaries) over packed columns? - correct answers A. smaller plate height (H) 
 B. [[[[greater column capacity]]]] 
 C. faster flow rates 
 D. No A-term in the van Deemter equation 
 E. higher separation efficiency 
 
Which mode of chromatography separates compounds based on th...
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CHEM 209 Quiz 3 Latest Version with Complete Solutions
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CHEM 209 Quiz 3 Latest Version with 
 
Complete Solutions 
 
What variables are typically plotted on the x- and y-axes of a chromatogram? 
 x-axis: time, y-axis: response 
 
What variables are typically plotted on the x- and y-axes of a calibration curve? 
 x-axis: concentration, y-axis: peak area 
 
What term describes the time it takes for a molecule to move through the column? 
 retention time 
 
What term describes the material coating the inside of the column in chromatography? 
 stationary...
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Chapter 24 Vocab Chem 241 UNC Questions And Answers Latest Update 2024
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carrier gas - correct answers MP gase in GC 
 
cold trapping - correct answers Splitless gas chromatography injection technique in which solute is condensed far below its boiling point in a narrow band at the start of the column. 
 
electron capture detector - correct answers gas chromatography detector that is particularly sensitive to compounds with halogen atoms, nitro groups, and other groups with high electron affinity 
 
flame ionization dectector - correct answers gas chromatography detec...
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CHEM 209 Quiz 3 Latest Update with Verified Solutions
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CHEM 209 Quiz 3 Latest Update with 
 
Verified Solutions 
 
Provide a diagram illustrating the key components of a GC instrument. 
 Answer: Reservoir for Mobile Phase (pressurized helium cylinder) -> Oven -> Sample 
Injector (micro-syringe) -> Stationary Phase (column) -> Detector (thermal conductor or flame 
ionization detector) -> Readout (computer) 
 
What variables are typically plotted on the x- and y- axes of (a) a chromatogram and (b) a 
calibration curve? 
 
 a. x: time, y...
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BACE EXAM 4.0 LABORATORY SKILLS 100% CORRECT
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BACE EXAM 4.0 LABORATORY SKILLS 100% CORRECT 
the process of cleaning something, especially with a chemical, in order to destroy bacteria. Disinfection 
Decontamination is the removal of dangerous substances, radioactivity or germs from...? an area object or person 
Decontamination is the removal of what? dangerous substances radioactivity and germs 
What is the purpose of aseptic technique? Aseptic technique assures that you don't introduce contaminants into a specimen and that infectious agen...
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ASCP MLS Module Exam 2024 Guide Questions Solved 100% Correct
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ASCP MLS Module Exam 2024 Guide Questions Solved 100% Correct 
A patient has increased serum phosphorus, decreased plasma free calcium, and decreased urinary phosphorus. This correlates with what? 
Primary hypoparathyroidism 
 
 
For therapeutic drug monitory, how should the specimen be handled? 
Mixed well to distribute heparin throughout before centrifugation 
 
 
reverse phase high-performance liquid chromatography for therapeutic drug monitory, they term reverse phase implies that the column...
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CHEM 237 - Organic Chemistry Lab Final Exam TAMU 100% Solved
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Separation by liquid-liquid extraction is based on 
a) compound's dielectric constant in 2 dif solvents 
b) # of theoretical plates in the separation 
c) use of phase transfer catalysts 
d) difference in boiling points of 2 liquids 
e) distribution of a compound between 2 immiscible phases - e) Distribution of a compound 
between two immiscible phases. 
Preparative gas chromatography is often chosen over distillation as a means of separation because gas 
chromatography 
a) is relatively inexpen...
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OCHEM 310 (lab) Boise state final || with 100% Accurate Solutions.OCHEM 310 (lab) Boise state final || with 100% Accurate Solutions.
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What does MgSO4 do when added to solution? correct answers It removes water that is dissolved in the solution 
 
Why is it more difficult to remove DMSO from a reaction mixture correct answers It has a very high boiling point (90% sure this is correct, but may be wrong) 
 
During recrystallization, what will happen if too much hot solvent is used to dissolve the crude compound? correct answers few or zero crystals will be isolated 
 
Why is it important to cover the reaction mixture during stirr...
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Chromatography UPDATED Exam Questions And Correct Answers
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Use of chromatography and different types - Chromatography is useful because it 
enables the separation, isolation, purification, and identification of components of extremely 
complex mixtures 
- There are different chromatography techniques: 
- Paper chromatography 
- Column chromatography 
- Thin layer chromatography 
- The results of chromatographic analysis are called chromatograms 
- The number of spots or peaks correspond to the number of components in the sample 
- If only one spot...
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