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Chapter 26: Q42P (page 749)
Measure the width of the peak at half-height in Figure 26-32 and calculate the plate number. The capillary length to detector was 40.0 cm. Find the plate height.
The plate number and plate height
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26-B. Vanadyl sulfate , FM 163.00), as supplied commercially, is contaminated withandA solution was prepared by dissolving 0.2447g of impurein 50.0 mL of water. Spectrophotometric analysis indicated that the concentration of the blueion was 0.0243M. A 5.00-mL sample was passed through a cation-exchange column loaded with. Whenfrom the 5.00-mL sample became bound to the column, thereleased required 13.03mL of 0.02274M NaOH for titration. Find the weight percent of each component) in the vanadyl sulfate.
Find the milliequivalents ofreleased if100mLofwere loaded on a cation exchange column in theform.
Would molecular exclusion, affinity, or hydrophobic interaction chromatography be most appropriate for each of the following applications?
When the following three compounds are separated by micellar electrokinetic chromatography at, three peaks are observed. When 10mMis added to the run buffer, two of the three peaks split into two peaks, giving a total of five peaks. Explain this observation and predict which compound does not split.
Totarlsulfexperimevt: Inorganic cations can be quantified by passing a salt solution throagh a cation-exchange columan in the form and titruting the relcasod H+with strong base. The moles of titrant equal the equivalenss of catioa charge in solution.
(a) What volume of 0.0231 M NaOH is needed to titrate the eluate when 10.00ml of ,have been loaded on a cation exchange columan in the H+foem?
(b) A 0.2692g sample of unknown salt is dissolved in demonized waler and loasedoato a cation exchange column in the H+form. The columin is rinsed with deionined water and the combincd loading and rinse solutions are titrated with 0.1396M KOH. A volume of 30.64mL is required to reach the endpoint. How many equivalents of cation are in the sample? Find the millieguivalents of cation per gram of sample (meq/g).
(c) The mass of substance containing one cquivalent is called the equivalent mas. If the cation has a +1 charge, the equivalent mass equals the molar mass. If the cation has a +2 charge, the equivalent mass is half the molar mass. What is the equivalent mass of the sample in (b)?
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