What are the predominant forms of acetic acid (pKa is 4.8) at a pH of 2 and a pH of 7?
At PH =2 CH3COOH
At PH 7 it is exist as equilibrium with dissociated form
CHH3COOH ------> CH3COO-
What are the predominant forms of acetic acid (pKa is 4.8) at a pH of 2...
1,2,and 3 please!!
Post-Lab Questions 1. The pKa value for the carboxylic structure of acetic acid at (a) pH- 1, (b) pH-7, and (c) p-13 acid group in acetic acid is 4.75. Write the predominant 2. Fill in the following table to show the theoretical results for the titration of 1.0 L of 0.20 M acetic acid by adding the designated amount of solid (no volume change) potassium hydroxide, KOH. Show a sample calculation of your work below. pH IH'T...
What is the predominant form of pyruvic acid (pKa =2.50) and lactic acid (pKa = 3.86) at physiological pH (7.4)? Draw the predominant structure of each. In which amino acid does the R group bond to the amino group?
1. The amino acid structures as shown in lecture are the predominant forms at physiological pH (7.4). a. Draw the predominant form of valine when the pH = 7.4 b. Draw the predominant form of valine when the pH = 1.0 c. Draw the predominant form of valine when the pH = 12.0 d. What is the total charge of the predominant form of valine when the pH = 7.4? e. What is the total charge of the predominant form...
1) An acetic acid aqueous solution has a pKa of 4.76 and pH of 3.00. What is the concentration of acetic acid? 2) An experiment requires you to culture mammalian cells in 10 mL of culture medium buffered to a pH of 7.4 with 25 mM HEPES. After the experiment, the pH dropped to 7.0. How many equivalents of acid must have been produced by the cells to have dropped the pH?
What is the pH of 1.0 mol of acetic acid (pKa = 4.76) in the presence of 0.3 mol of NaOH? Is this in the buffering region based on the titration curve?
46. The pka for acetic acid is 4.76. What is the pH of a 0.04 M solution? (1) (3) 3.03 12.1 5.88 1.40 3.08 (5)
3. a. What concentration of acetic acid will have a pH of 2.50? pKa = 4.76 b. What concentration of oxalic acid, shown below, will have a pH of 2.50? pKa1 = 1.25, pKa2 = 4.14 c. One way oxalic acid can be produced in fungi is by hydrolysis of oxaloacetate, an intermediate in the Kreb’s citric acid cycle, to produce oxalic acid and acetic acid. This reaction, shown below, is catalyzed by oxaloacetase. [O2CC(O)CH2CO2] 2− + H2O → C2O2−...
Sodium acetate (Na CH3COO), (pKa=4.8), is added to water. Determine the pH of a 0.015 M solution of sodium acetate. (Hint CH3OO− is the conjugate baseof acetic acid CH3COOH
QUESTION 28 What is the pH of a solution containing 0.1 M acetic acid (pka = 4.7) and 0.4 M sodium acetate? (Show your work)
You are making a pH 5.0 buffer with acetic acid (pKa = 4.75) and sodium acetate. You want the total concentration of acetate ([acetic acid] + [sodium acetate] ), to be 0.50 M. What concentrations of acetic acid and sodium acetate do you use to make your buffer? acetic acid sodium acetate