The van Deemter equation decribes how the column, stationary phase, and linear velocity influence plate height. The equation is B Ux Match each symbol with its term in the van Deemter equation. H=A+ 00000 + Cux plate height linear velocity multiple path (eddy diffusion) equilibration time (mass transfer) longitudinal diffusion Answer Bank longitudinal diffusion equilibration time and linear velocity linear velocity and multiple paths linear velocity multiple paths and longitudinal diffusion H B A Ux For an open tubular column (not capillary electrophoresis), which term(s) in the van Deemter equation does(do) not affect the plate height? O multiple paths

The van Deemter equation decribes how the column, stationary phase, and linear velocity influence plate height. The equation is B Ux Match each symbol with its term in the van Deemter equation. H=A+ 00000 + Cux plate height linear velocity multiple path (eddy diffusion) equilibration time (mass transfer) longitudinal diffusion Answer Bank longitudinal diffusion equilibration time and linear velocity linear velocity and multiple paths linear velocity multiple paths and longitudinal diffusion H B A Ux For an open tubular column (not capillary electrophoresis), which term(s) in the van Deemter equation does(do) not affect the plate height? O multiple paths

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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An amino acid moves randomly through water with steps of about 3 angstroms (3 x 10^-8 cm) in length at a rate of 1 x 10^10 steps per second. This substance is passing through a reverse phase HPLC column which has a plate height of 0.010 cm. 1. Estimate the diffusion coefficient for the amino acid in water. 2. Calculate the width at the base of the elution zone after the amino acid has migrated 50 cm through the column
Nitrogen from a gaseous phase is to be diffused into pure iron at 700°C. If the surface concentration is maintained at 0.27 wt% N, what will be the concentration (in weight percent) 3.7 mm from the surface after 5.2 h? The diffusion coefficient for nitrogen in iron at 700°C is 4.7 × 10-10 m²/s. erf(z) erf(z) erf(z) 0.00 0.0000 0.55 0.5633 1.3 0.9340 0.025 0.0282 0.60 0.6039 1.4 0.9523 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.15 0.1680 0.75 0.7112 1.7 0.9838 0.20 0.2227 0.80 0.7421 1.8 0.9891 0.25 0.2763 0.85 0.7707 1.9 0.9928 0.30 0.3286 0.90 0.7970 2.0 0.9953 0.35 0.3794 0.95 0.8209 2.2 0.9981 0.40 0.4284 1.0 0.8427 2.4 0.9993 0.45 0.4755 1.1 0.8802 2.6 0.9998 0.50 0.5205 1.2 0.9103 2.8 0.9999 i weight percent
1. Asking for question no 2 2. I also upload answer for no 1
The pure water flux of a membrane with a diameter of 7.5 cm has to be determined as a function of the applied pressure (see Table). The following results are obtained. Determine the water permeability coefficient by means of a graph
A sample of enzyme involved in alcohol metabolism, extracted and purified extensively from yeast cultures, was loaded onto a gel filtration column for molecular weight approximation. A set of protein standards with known molecular weight was eluted separately through the same column and suitable buffer following the elution of blue dextran for void volume determination. The following table summarizes the data obtained from the experiment: Elution flow rate 1 mL/min Sample collector setting Continuous; Sequential Container change rate 1 tube/min Sample/Standard eluted Test tube No/s. MW (Da) Blue dextran 4 2,000,000 Bovine thyroglobulin 11 669,000 Horse spleen apoferritin 14 443,000 Beta-amylase from sweet potato 21 200,000 Bovine serum albumin 27 66,000 Alcohol metabolism enzyme 19 ? 1. Process the given raw data in a tabular format of properly identified data points ready for calibration curve plotting. 2. Construct the calibration curve using MS Excel for use in MW determination.…
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Cells in the front of the cornea obtain their oxygen from the air. Wearing contacts can interfere with this oxygen uptake, so it is really important that contact lenses are designed to permit the diffusion of oxygen. For a specific brand of contact lenses the diffusion coefficient is 1.3 x 10-13m² /s. Model the contact lens as a disk with a diameter of 14 mm and a thickness of 40µm. The pressure of the oxygen in the air is 20% of atmospheric pressure; the pressure in the space between your cornea and the contact lens is 7.5 kPa. At 300C, how many oxygen molecules cross the lens in 1 hour?
As a particle geometry deviates from that of a sphere (MW unchanged), the result on the sedimentation coefficient measured under otherwise identical conditions would be: Sedimentation coefficient increases Sedimentation coefficient decreases Sedimentation coefficient is independent of geometry Cannot be predicted without conducting the experiment
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Given the following data in the Determination of Molar Mass of CO2 lab : Mass (before rxn): test tube + HCl(aq) + stir bar + capsule Mass (after rxn): test tube + HCl(aq) + stir bar + capsule Volume of water displaced from squirt bottle Temperature of CO₂(g) 26.611 g 25.783 g 144 mL CO2(g) pressure Gas constant R 293.6 K 0.986 atm 0.08206 L'atm/mol.K a) Calculate the mass of CO₂(g) produced, in grams. b) Calculate the density of CO₂(g) in g/L. C) Calculate an experimental value for the molar mass of CO2 based on the mass, volume, and temperature data from the Determination of Molar Mass of CO₂ lab. d) Calculate the number of moles of CO₂(g) produced. Use the accepted value for the molar mass of CO2.