2025年2月9日 · The pKa of NH3, also known as ammonia, is approximately 38. Ammonia is a weak base, meaning it does not completely dissociate in water to form hydroxide ions. The pKa value indicates the extent to ...

Explain why the pKa of the - NH3+ group of an a-amino acid is lower than the pKa of the ammonium ion derived from a 1° amine (RNH3+). For example the pKa of the - NH3+ group of alanine is 9.87 but the pKa of CH3NH3+ is 10.63.

calculate the concentration of NH3 (pKa (NH4+/NH3)= 9.25) if the pH =10. please explain how to get to the answer (0.66mM) Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on.

Histidine is an amino acid with three titratable groups: an NH3+ group (pKa = 9.2), a COOH group (pKa = 1.8), and an imidazole (amine-like) group (pKa = 6.0). Calculate the value of pI for histidine.Question 9 options:3.95.77.65.5

Answer to Ammonia, NH3, has pKa=36, and acetone has pKa19. Will

5. Ethyne (HC=CH) has a pKa value of 25, water has a pka value of 15.7, and ammonia (NH3) has a pka value of 36. Draw the equation, showing equilibrium arrows that indicate whether reactants or products are favored, for the acid-base reaction of ethyne with a. HO- . b. -NH2. c.

What percentage of total ammonia (i.e., NH3 + NH4 + ) is present as NH3 at pH 7? pKa for NH4 = 9.3. NH4 ...

1. Record pKa values for the following: HNO3, NH3, CH3COOH, HCl, CH3CHOHCOOH. 2. Buffers are prepared by mixing conjugate acid/base pairs. Identify the alkali metal salt that would be appropriate for all of the species included in #1 above. For ammonia, include a likely ammonium salt. Explain whether there are acids listed in #1 that cannot be ...

Ethyne has a pKa value of 25, water has a pKa value of 15.7, and ammonia (NH3) has a pKa value of 36. Write the equation in the direction, which favors the equilibrium, for the acid-base reaction of ethyne with HO−. Express your answer as an acid-base reaction.

The pKa value of NH4+ = NH3 + H+ is 9.25. How many mL of 0.1 M NH4Cl must one mix with how many mL 0.1 M NH3 to make a buffer whose pH = 9.0? Your solution’s ready to go!