Which of the following acid/conjugate base pairs has a pKa value of 9.44? A. Ammonium/ammonia B. carboxylic acid/carboxylate C. imidazolium/imidazole
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Which of the following acid/conjugate base pairs has a pKa value of 9.44?
A. Ammonium/ammonia B. carboxylic acid/carboxylate C. imidazolium/imidazole
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- Two pKa values are reported for malonic acid, a compound with twoCOOH groups. Explain why one pKa is lower and one pKa is higher thanthe pKa of acetic acid (CH3COOH, pKa = 4.8).The simplest amino acid is glycine. The pKa value for its carboxylic acid group is 2.34 and the pKa value for the conjugate acid of the amino group is 9.60. Draw the product of the acid-base reaction that would take place when glycine reacts with itself..give a clear handwritten answerThe base B has pKb 4.00. Find the fraction in the form B and the fraction in the form BH at pH (a) 9.00; (b) 10.00; (c) 10.30.
- 1 The below terms (i) and (ii) are both 8.2 as a value for the aminoAcid. Calcuate PI and show steps. (i)pKa of protonatedAmine and Carboxylic Acid:8.2 (ii)PKR:8.2Using the titration data below, plot the titration curve of this unknown diprotic amino acid and determine pKa1. Report your final answer to two places after the decimal.Draw a diagram (picture) showing the principle species in solution as a function of pH for a mixture of 0.0200 M formic acid and 0.0100 M ascorbic acid. The Y axis should be concentration. The X axis should be pH and you will need to look up the pKa values
- Which statement about the pKa value is false? * A- The pKa value is calculated from the equilibrium constant for the dissociation of the acid. B- The pKa value is a measure of the strength of an acid. C- The pKa value of a given acid gives an indication of the strength of the conjugate base of that acid. D- A larger pKa value indicates a stronger acid and a weaker associated conjugate base. E- All of these statements are correct.Some weak acids and their pKa values are given below. Which one of these acids will have the STRONGEST conjugate base? Select one: a. Phenol; pKa = 10.00 b. Methanoic acid; pKa = 3.75 c. Bromoethanoic acid; pKa = 2.9 d. Methanol; pKa = 15.54If the concentration of an acid in solution is 2.2 times larger than the concentration of its conjugate base, and the pH of the solution is 3.5, what is the pKa of the acid? Include the answer to 3 significant figures