Define superficially porous particle requires lower pressure

Assignment Help Chemistry
Reference no: EM13546080

a.) Sketch a graph of the van Deemter equation (plate height vs. linear flow rate). What would the curve look like if the mutliple path term were 0? If the longitudinal diffusion term were 0? If the finite equilibration time term were 0?

b.) Explain why the van Deemter curve for 1.8μm particles is nearly flat at high flow rate.

c.) Explain why the 2.7 μm superficially porous particle enables separations similar to those achieved by 1.8 μm totally porous particles, but the superficially porous particle requires lower pressure.

Reference no: EM13546080

Questions Cloud

Find by how much would the moment of inertia change : will true moment of inertia of the dumbell system be larger or smaller than I=2MR^2M suggests? if Rm where to double by how much would the moment of inertia change
Depict the skeletal structure of (ch3)3cch2chc(ch3)2 : I do not understand how to draw the skeletal structure of (CH3)3CCH2CHC(CH3)2 and (CH3)2CHCHCHC(CH3)3
What is the period of rotation of the disk now : A jewel smith wishing to buff a finished piece of jewelry attaches a buffing disk to his drill. What is the period of rotation of the disk now
What is the height of the image on her retina : A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 56.11 diopters, and the lens-to-retina distance is 1.791 cm. (a) How far is the blackboard from her eyes? (b) If the writing on the blackboard i..
Define superficially porous particle requires lower pressure : Explain why the 2.7 μm superficially porous particle enables separations similar to those achieved by 1.8 μm totally porous particles, but the superficially porous particle requires lower pressure.
Explain the largest intermolecular dispersion forces : Of Br2, Ne, HCl, HBr, N2 which is likely to have a) the largest intermolecular dispersion forces and why
Obtain the magnitude of the charge density on each plate : parallel-plate capacitor with area 0.500m^2 and plate seperation of 2.00mm is connected to a 9.00-V battery. Find the magnitude of the charge density on each plate
Explain difference solutions absorb specific wavelengths : Explain why there is a direct relationship between the concentration of a solution and a solution's absorbance of light. Why do difference solutions absorb specific wavelengths of light and not all wavelenghts of light
How long did it take the apple to fall : An apple falls from a tree and takes 4 s to reach the ground as reported by the earth-bound observer. how long did it take the apple to fall

Reviews

Write a Review

Chemistry Questions & Answers

  Explain naoh to reach an end point in titration

Lactic acid, HC3H5O3, is a monoproctic acid that forms when milk sours. An 18.50 ml sample of a solution of lactic acid required 17.52 ml of 0.1550 M NaOH to reach an end point in titration.

  State what is the molar mass of the unknown solution

What is the molar mass of the unknown solution containing 1.01 g of unknown in 17.74 g biphenyle froze at 42 degrees C. Pure biphenyl freezes at 71.0C

  Explain based upon the intermolecular forces present

Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the substance.

  Define ozone and how it works as protective molecule

What is ozone and how it works as a protective molecule for our environment? What are the effects of CFCs on the ozone layer.

  Explain what is the pathlength of the second cuvette

A particular dye solution has an absorbance of 0.984 in a 2.0-cm pathlength cuvette. When the same solution is placed in another cuvette, it has an absorbance of 0.652. What is the pathlength of the second cuvette

  Define what is the molar absorptivity

In a lab experiment demonstrating Beer's law, the absorbance of a 0.15 M sample of solution A was 0.750 at the wavelength of maximum absorbance. What is the molar absorptivity (extinction coefficient) if the path length is 1 cm

  Compute rate constant

Calculate rate constant for 1. level reaction where 81% of the matters have already react after 27 seconds.

  A gas sample in a piston assembly expands doing 588 kj of

a gas sample in a piston assembly expands doing 588 kj of work on its surroundings at the same time that 372 kj heat is

  Calculate the work in kj when 300 moles of hydrogen gas are

calculate the work in kj when 3.00 moles of hydrogen gas are produced from the reaction of sodium in excess water at

  Explain the reaction of propanal with sodium cyanide

Draw the product of the reaction of propanal with methanol containing dissolved hydrogen chloride. Draw the product of the reaction of propanal with sodium cyanide with addition of sulfuric acid

  State advantages and disadvantages and levels of sensitivity

Compare and contrast the following: size exclusion chromatography and ion exchange chromatography. points to include would be methods of action used in both, examples of use for both, advantages and disadvantages and levels of sensitivity or detec..

  Compute the composition of dry air

Use a spreadsheet to calculate the composition of dry air at 5400K and 1 bar. Take the initial composition as .78 mol N2, .21 mol O2 and .01 mol Ar. Neglect the ionization of NO.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd