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Chapter 23: Q26P (page 630)

The retention volume of a solute is 76.2mL for a column withVm=16.6mL andVs=12.7mL . Calculate the retention factor and the partition coefficient for this solute.

Short Answer

Expert verified
  1. Retention factor = k = 3.59
  2. Partition coefficient= K = 4.69

Step by step solution

01

Given Information:

Vr=76.2mL,Vm=16.6mL,Vs=12.7mL

02

To find the Retention factor:

Retention factor as

k=Vr-VmVm

Substitute the given data values are

k=76.2mL-16.6mLVmk=3.59

03

To find the Partition coefficient;

K=k脳VmVs

Substitute the given data values are

k=3.59脳16.6mLK=4.69

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Most popular questions from this chapter

A solute with partition co-efficient of 4.0 is extracted from 10 mL of phase 1 into phase 2.

(a) What volume of phase 2 is needed to extract 99% of the solute in one extraction?

(b) What is the total volume of solvent 2 needed to remove 99% of the solute in three equal extractions?

Two compounds with partition coefficients of 15 and 18 are to be

separated on a column with Vmi/Vs=3.0and localid="1654950413291" tm=1.0min. Calculate the

number of theoretical plates needed to produce a resolution of 1.5 .

Solvent passes through a column in 3minbut solute requires9min (a) Calculate the retention factor,k.(b) What fraction of time is the solute in the mobile phase in the column? (c) The volume of stationary phase is110of the volume of the mobile phase in the columnVS=0.10VM. Find the partition coefficient, K, for this system.

Butanoic acid has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the formal concentration of butanoic acid in each phase when 100mL of 0.10M aqueous butanoic acid is extracted with 25mL of benzene (a) at pH 4.00 and (b) at pH 10.00.

Solute S has a partition coefficient of 4.0 between water (phase 1) and chloroform (phase 2) in Equation 23-1.

(a) Calculate the concentration of in chloroform if[S]aqis 0.020M.

(b) If the volume of water is 80.0 mL and the volume of chloroform is 10.0 mL, find the quotient localid="1654852656619" (molSinchloroform)(molSinwater).
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