Question
In: Chemistry
a) Increasing the flow rate of the mobile phase would 1. increase longitudinal diffusion. 2. increase...
a) Increasing the flow rate of the mobile phase would
1. increase longitudinal diffusion.
2. increase broadening due to mass transfer.
3. increase broadening due to multiple paths.
b) How many 50 mL extractions will it take to remove 95% of Compound A that is in 20 mL of water, if K = 0.3?
Solutions
queen_honey_blossom answered 11 months agoRelated Solutions
Answer the following multiple choice questions below: 1a. Increasing the flow rate of the mobile phase...
Answer the following multiple choice questions
below:
1a. Increasing the flow rate of the mobile phase
would:
A.
increase longitudinal diffusion.
B.
affect nothing.
C.
increase broadening due to multiple paths.
D.
increase broadening due to mass transfer.
1b. Reverse phase HPLC of a multi-component solute
usually uses:
A
.
an isocratic polar solvent.
B.
a polar stationary phase.
C.
a gradient from more polar to less polar
solvent.
D.
a gradient from less polar to more polar
solvent.
1c....
what's the effect of change in mobile phase flow rate in HPLC and the effect of...
what's the effect of change in mobile phase flow rate in
HPLC
and the effect of change of injection volume in HPLC?
HPLC problem: Would you increase or decrease the time it takes to change the mobile phase...
HPLC problem:
Would you increase or decrease the time it takes to change the
mobile phase gradient from 40 % acetonitrile/60 % aqueous buffer to
one that is 90% acetonitrile/10% aqueous buffer if the goal is to
elute the more non-polar riboflavin in a shorter retention time
using a C18 column?
What is Diffusion? List 3 factors that increase the rate of diffusion
What is Diffusion? List 3 factors that increase the rate of
diffusion
1. What is typically the mobile phase in gas chromatography? 2. What affect is expected for...
1. What is typically the mobile phase in gas chromatography?
2. What affect is expected for retention times in a gas
chromatography experiment if the temperature of the column is
reduced?
3. If a significant clog in a 30 m capillary column is so severe
that it has to be trimmed to 20 m, how will this affect its ability
to effectively separate mixtures of compounds?
4. Why is CH2Cl2 the first peak observed in the gas
chromatograms for this...
1. What is typically the mobile phase in gas chromatography? 2. What affect is expected for...
1. What is typically the mobile phase in gas chromatography?
2. What affect is expected for retention times in a gas
chromatography experiment if the temperature of the column is
reduced?
3. If a significant clog in a 30 m capillary column is so severe
that it has to be trimmed to 20 m, how will this affect its ability
to effectively separate mixtures of compounds?
4. Why is CH2Cl2 the first peak observed in the gas
chromatograms for this...
Question 2 Which of these would increase in the net cash flow to the company? a)...
Question 2
Which of these would increase in the net cash flow to the
company?
a)
Increasing inventory by $100,000
b)
Selling bonds
c)
Decreasing sales
d)
None of the above would increase the net cash flow
Question 6
Agency theory is of most concern in what type of business
structure?
a)
Sole proprietorship
b)
Partnership
c)
Corporation
d)
In all three equally
Question 8
Calculated free cash flow considers each of...
1). A plug-flow reactor has a flow pattern of uniform velocity and concentration in the axial (longitudinal)...
1). A
plug-flow reactor has a flow pattern of uniform velocity and
concentration in the axial (longitudinal) direction.
(T), (F)
2). For
natural water (pH around 6−8), alkalinity is equal to the
concentration of HCO3-. (T), (F)
3). Unit
operation means a treatment unit in which “treatment” is
accomplished through chemical/biological means. (T),
(F)
4). Based on the
law of mass action, the reaction rate is proportional to the
remaining concentration of the products
(T), (F)
5). Strict
household use from public water supply systems is...
1. Which of the following factors would decrease the rate of diffusion? (Select all that apply)...
1. Which of the following factors would decrease the rate of
diffusion? (Select all that apply)
Check All That Apply
increased molecular weightincreased molecular weight
decreased molecular sizedecreased molecular size
larger concentration gradientlarger concentration gradient
denser mediadenser media
smaller concentration gradient
2.
Which of the following factors would increase the rate of
diffusion? (Select all that apply)
Check All That Apply
increased molecular weightincreased molecular weight
decreased molecular sizedecreased molecular size
larger concentration gradientlarger concentration gradient
denser mediadenser media
thinner...
1. In Normal-phase HPLC (hexane is used as the mobile phase), which one elute first and...
1. In Normal-phase HPLC (hexane is used as the mobile
phase), which one elute first and which one elute last? Sample
mixture consist of Phenol, Toluene, and Ethylbenzene. Explain the
elution order of the components in HPLC in terms of functionalities
of the compound mixture.
2. If different mobile phase has used instead of hexane,
how it will affect elution order and/or elution time?
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