Chapter 0: Q40P (page 1)
Calculate the isoelectric and isoionicpHof 0.010Mthreonine.
Short Answer
The isoelectric and isoionic pH of 0.010M threonine is 5.72 and 5.59.
Chapter 0: Q40P (page 1)
Calculate the isoelectric and isoionicpHof 0.010Mthreonine.
The isoelectric and isoionic pH of 0.010M threonine is 5.72 and 5.59.
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Get started for freeIn the Kjeldahl nitrogen determination, the final product is a solution ofin HCl solution. It is necessary to titrate the HCl without titrating.
(a) Calculate the pH of pure 0.010 M.
(b) Select an indicator that would allow you to titrate HCl but not.
A solid mixture weighing 0.05485 gcontained only ferrous ammonium sulphate and ferrous chloride. The sample was dissolved in, and the required 13.39 mL oflocalid="1663577431957" for complete oxidation to localid="1663577453691" . Calculate the weight percent of Cl in the original sample. If you need refreshing, see Section 7-2 for an example of a titration of a mixture.
localid="1663574328546"
Ferrous ammonium sulfate Ferrous chloride
FM 392.13
FM 234.84
Titration of metal ion with EDTA. Use Equation 12-11 to compute curves (pM versus mL of EDTA added) for the titration of 10.00 mL of 1.00 mM M2+ (= Cd2+ or Cu2+) with 10.0 mM EDTA at pH 5.00. Plot both curves on one graph.
How many grams of perchloric acid, , are contained in of aqueous perchloric acid? How many grams of water are in the same solution?
The figure shows reversed-phase retention data for three compounds.
(a) Identify whether compounds A, B, and C are weak acids or bases. For each compound, what isand the retention factor of the fully protonated form?
(b) Over what pHrange would a method be least rugged with regard to retention of component C?
(c) Each different symbol in the plot indicates a different buffer (circle pH2.48phosphate; plus pH5.01acetate; and so on). Why are different buffers used for this experiment?
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