1
answer
0
watching
525
views
19 Nov 2019
Base/Acid Ratios in Buffers Acetic acid has a Ka of 1.8 Ã 10-5 . Three acetic acid/acetate buffer solutions. A, B, and C, were made using varying concentrations: Just as pH is the negative logarithm of [HO pKa is the negative logarithm of K 1. acetic acid ten times greater than acetate 2. acetate ten times greater than acetic acid. and 3. acetate] =[acetic acid The Henderson-Hasselbalch equation is used to calculate the pH of buffer solutions: Match each buffer to the expected pH. Drag each item to the appropriate bin. pH= pK, + log-base Hints Notice that the pII of a buffer has a value close to the pKa of the acid, differing only by the logarithm of the concentration ratio [base / acid] Reset Help pH = 3.74 pH = 4.74 pH 5.74 Submit My Answers Give Up Correct Part B How many grams of dry NHCl need to be added to 2.20 L of a 0.600 M solution of ammonia, NHs, to prepare a buffer solution that has a pH of 8.60? K for ammonia is 1.8 x 10-
Base/Acid Ratios in Buffers Acetic acid has a Ka of 1.8 Ã 10-5 . Three acetic acid/acetate buffer solutions. A, B, and C, were made using varying concentrations: Just as pH is the negative logarithm of [HO pKa is the negative logarithm of K 1. acetic acid ten times greater than acetate 2. acetate ten times greater than acetic acid. and 3. acetate] =[acetic acid The Henderson-Hasselbalch equation is used to calculate the pH of buffer solutions: Match each buffer to the expected pH. Drag each item to the appropriate bin. pH= pK, + log-base Hints Notice that the pII of a buffer has a value close to the pKa of the acid, differing only by the logarithm of the concentration ratio [base / acid] Reset Help pH = 3.74 pH = 4.74 pH 5.74 Submit My Answers Give Up Correct Part B How many grams of dry NHCl need to be added to 2.20 L of a 0.600 M solution of ammonia, NHs, to prepare a buffer solution that has a pH of 8.60? K for ammonia is 1.8 x 10-
Casey DurganLv2
11 May 2019