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The system in Figure 26-7 can be adapted to produce the strong acid eluent methane sulfonic acid(CH3SO3-H+). For this purpose, the polarity of the electrodes is reversed and the reservoir containsNH4+CH3SO3-. The barrier membrane and the resin bed at the bottom of the figure must both be anion-exchangers loaded withCH3SO3-.Draw this system and write the chemistry that occurs in each part.

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The system in the Figure 26-7 can be adapted in order to produce the strong acid eluent methane sulfonic acid. Here we will draw the system and write the chemistry that occurs in each part.

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Most popular questions from this chapter

Fluorescent derivatives of amino acids separated by capillary zone electrophoresis had migration times with the following order: arginine (fastest) , phenylalanine , asparagine , serine , glycine(slowest). Explain why arginine has the shortest migration time.

Totarlsulfexperimevt: Inorganic cations can be quantified by passing a salt solution throagh a cation-exchange columan in the OH-form and titruting the relcasod H+with strong base. The moles of OH-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 0.0458MKNO3,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)?

(a) Suppose that the reservoir in Figure 26-7 contains 1.5 L of 2.0 M K2PO4. For how many hours can the reservoir provide 20mM KOH at a flow rate of 1.0 mL/min if 75% consumption ofin the reservoir is feasible?

(b) What starting and ending current would be required to produce a gradient from 5.0 mM KOH to 0.10 M KOH at 1.0 mL/min flow rate?

The observed behavior of benzyl alcohol (C6H5CH2OH) in capillary electrophoresis is given here. Draw a graph showing the number of plates versus the electric field and explain what happens as the field increases.

26-B. Vanadyl sulfate VOSO4, FM 163.00), as supplied commercially, is contaminated withH2SO4(FM98.08)andH2OA solution was prepared by dissolving 0.2447g of impureVO2+in 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 withH+. WhenVO2+from 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 componentVOSO4,H2SO4andH2O) in the vanadyl sulfate.

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