
(a)
Interpretation:
The effect of increasing the mass of stationaryphase relative to the packing masson the plate height needs to be explained.
Concept introduction:
As the number of plates increases in a GC column, the resolution would also increase. For increasing the number of plates, the height of the plates has to be decreased for maintaining a high resolution. The van Deemter equation is used for defining the effect of different parameters on the height of plate.
(b)
Interpretation:
The effect of decreasing the rate of sample injection on the plate height needs to be explained.
Concept introduction:
The resolution will increase as the number of plates increases in the GC column. For maintaining a high resolution and increasing the number of plates, the height of the plates must be decreased. For defining the effect of different parameters on the height of plate, van Deemter equation is used.
(c)
Interpretation:
The effect of increasing the injection port temperature on the plate height needs to be explained.
Concept introduction:
In GC column resolution will increases as the number of plates increases.For maintaining a high resolution and increasing the number of plates, the height of the plates has to be decreased. For defining the dependencies of various parameters on the height of plate, van Deemter equation is used.
(d)
Interpretation:
The effect of increasing the flow rate on the plate height needs to be explained.
Concept introduction:
As the number of plates increases in a GC column, the resolution would also increase. For increasing the number of plates, the height of the plates has to be decreased for maintaining a high resolution. The van Deemter equation is used for defining the effect of different parameters on the height of plate.
(e)
Interpretation:
The effect of reducing the particle sizeof the packing on the plate height needs to be explained.
Concept introduction:
The resolution will increase as the number of plates increases in the GC column. For maintaining a high resolution and increasing the number of plates, the height of the plates must be decreased. For defining the effect of different parameters on the height of plate, van Deemter equation is used.
(f)
Interpretation:
The effect of decreasing the column temperature on the plate height needs to be explained.
Concept introduction:
In GC column resolution will increases as the number of plates increases. For maintaining a high resolution and increasing the number of plates, the height of the plates has to be decreased. For defining the dependencies of various parameters on the height of plate, van Deemter equation is used.

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Chapter 27 Solutions
Principles of Instrumental Analysis
- Experiment 27 hates & Mechanisms of Reations Method I visual Clock Reaction A. Concentration effects on reaction Rates Iodine Run [I] mol/L [S₂082] | Time mo/L (SCC) 0.04 54.7 Log 1/ Time Temp Log [ ] 13,20] (time) / [I] 199 20.06 23.0 30.04 0.04 0.04 80.0 22.8 45 40.02 0.04 79.0 21.6 50.08 0.03 51.0 22.4 60-080-02 95.0 23.4 7 0.08 0-01 1970 23.4 8 0.08 0.04 16.1 22.6arrow_forward(15 pts) Consider the molecule B2H6. Generate a molecular orbital diagram but this time using a different approach that draws on your knowledge and ability to put concepts together. First use VSEPR or some other method to make sure you know the ground state structure of the molecule. Next, generate an MO diagram for BH2. Sketch the highest occupied and lowest unoccupied MOs of the BH2 fragment. These are called frontier orbitals. Now use these frontier orbitals as your basis set for producing LGO's for B2H6. Since the BH2 frontier orbitals become the LGOS, you will have to think about what is in the middle of the molecule and treat its basis as well. Do you arrive at the same qualitative MO diagram as is discussed in the book? Sketch the new highest occupied and lowest unoccupied MOs for the molecule (B2H6).arrow_forwardQ8: Propose an efficient synthesis of cyclopentene from cyclopentane.arrow_forward
- Q7: Use compound A-D, design two different ways to synthesize E. Which way is preferred? Please explain. CH3I ONa NaOCH 3 A B C D E OCH3arrow_forwardPredict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forward(10 pts) The density of metallic copper is 8.92 g cm³. The structure of this metal is cubic close-packed. What is the atomic radius of copper in copper metal?arrow_forward
- Predict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forwardPredict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2).arrow_forwardQ3: Rank the following compounds in increasing reactivity of E1 and E2 eliminations, respectively. Br ca. go do A CI CI B C CI Darrow_forward
- Q5: Predict major product(s) for the following reactions. Note the mechanism(s) of the reactions (SN1, E1, SN2 or E2). H₂O דיי "Br KN3 CH3CH2OH NaNH2 NH3 Page 3 of 6 Chem 0310 Organic Chemistry 1 HW Problem Sets CI Br excess NaOCH 3 CH3OH Br KOC(CH3)3 DuckDuckGarrow_forwardQ4: Circle the substrate that gives a single alkene product in a E2 elimination. CI CI Br Brarrow_forwardPlease calculate the chemical shift of each protonsarrow_forward
- Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
