What is the pKa of the carboxylate group in beta-alanine if a 0.0005M solution has a pH of 4?
What is the pKa of the carboxylate group in beta-alanine if a 0.0005M solution has a...
What is the pH of alanine solution in which a-amino group is one-half dissociated? pKa values are pK (-COOH) 2.43 and pK(-NH3+) 9.69, respectively.
Alanine is a diprotic amino acid with a pka = 2.344 for the carboxylic group and a pka = 9.868 for the ammonium group. At pH = 6.32, what is the principal species in solution? a. H2L+ b. c. HL d. H3L2+ e. L2-
A biochemist wishes to use alanine to buffer a solution at pH 2.94. Alanine has two ionizable groups, with pKa values of 2.34, and 9.6. She has 200 ml of a 0.1 M alanine solution at pH 9.6. What volume of 1.0 M HCl must she add to bring the pH to 2.94?
For alanine, the pKa(COOH)=2.3, pKa(NH3)=9.7 Select the true answers by referring to the structure of alanine, shown above at pH= 7.0. Please note the pH at which the titration was started. True False Alanine has a buffer region near pH 10. True False At point B, the net charge is +1. True False At point B, the net charge is +0.5 True False At the isoelectric point, C, pH = 6.0 True False Alanine has a buffer region near pH 6. True False At the isoelectric...
Alanine (H2NCH(CH3) is a common amino acid that has a basic amino group. A) Write an equilibrium for the reaction of alanine acting as a Bronsted base with a water molecule. (Ka of protonated amino group = 1.349 x 10 -10 B) Calculate the Kb of the amino group C) Calculate the pOH of a 0.025M solution of alanine in water D) Calculate the pH value of a 0.025M solution of alanine in water E) Describe how the equilibrium would...
The pKa of the alpha-carboxyl group of phenylalanine is 1.83, and the pKa of its alpha-amino group is is 9.13. Calculate the average net charge on phenylalanine if it is in a solution that has a pH of 8.40.
The pKa of the α-carboxyl group of serine is 2.21, and the pKa of its α-amino group is is 9.15. Calculate the average net charge on serine if it is in a solution that has a pH of 8.00
Which of the following functional groups has a pKa value of 6.14? A. carboxylic acid/carboxylate B. imidazolium/imidazole C. ammonium/ammonia
12) use the amino acid alanine for the following questions, Sirolis hore Circle the pka T. a) most acidic. proston (H₂N I Pka=2 6) determine the equilibrium constant H. for acid base reaction involving the Carboxylic acido vosopistost Men to lopno stod bado 750W NOWNW Cal @ PH=7.4, does the amino group " favor the protonated or deprotonats form. explain. het illos natin. 3 0 W
of alanine has a pk of 9.87. What is the 153, The amino group charge on that amino group at pH 7.0 145. Which amino acid serves as the first amino acid at the hN terminus of a newly synthesized protein? (B) methionine (A) alanine 9.80. The side chain of that amino acid includes (A) an amine group (C) a carboxylic acid group. (D) an alcohol 154. A certain amino acid has a pl (or pH, isoelectric point) (D) threonine...