You have a 1 M solution of CH3COOH and 2.5 MM CH3COONa.
Determine the volumes of...
You have a 1 M solution of CH3COOH and 2.5 MM CH3COONa.
Determine the volumes of these two solutions and water you would
need to make the following solutions. The pKa of CH3COOH is 4.76.
a. pH=6,0.2M Acetate,1L
Calculate the pH of a buffer system containing 1.0 M
CH3COOH and 1.0 M CH3COONa.
a) Using the Henderson-Hasselbalch equation
b) Making no assumptions about quantities (use the quadratic
equation)
c) Compare and explain your results in a) and b)
d) What is the pH of a buffer system after the addition of 0.10
moles of gaseous HCl to a 1.0 L of the solution? Assume that the
volume of the solution does not change when the HCl is added....
Calculate the pH of 0.100 L of the buffer 0.110 M CH3COONa/0.130
M CH3COOH before and after the addition of the following species.
(Assume there is no change in volume.)
(a) pH of the starting buffer:
(b) pH after addition of 0.0030 mol HCl:
(c) pH after addition of 0.0040 mol NaOH (added to a fresh
solution of the starting buffer):
Calculate the pH of 1.00 L of a buffer 0.98 M CH3COONa/0.92 M
CH3COOH before and after the addition of the following species
A. pH of starting buffer:
B. pH after addition if 0.040 mol NaOH:
C. pH after further addition if 0.101 mol HCl
Calculate the pH of 1.00 L of the buffer 1.06
M
CH3COONa/1.09
M CH3COOH before and
after the addition of the following species. (Assume there is no
change in volume.)
(a) pH of starting buffer:
(b) pH after addition of 0.060 mol NaOH:
(c) pH after further addition of 0.109 mol
HCl:
You just calculated the ratios of [CH3COONa] /[CH3COOH]. You
also know that the total concentration for both buffers is 0.1M
([CH3COONa]+[CH3COOH]=0.1M). Now calculate the concentration of
[CH3COONa] and [CH3COOH] for each buffer.
pH
[CH3COOH]
[CH3COONa]
4.74
6
A 25.0 mL solution of 0.100 M CH3COOH is titrated with a 0.200 M
KOH solution. Calculate the pH after the following additions of the
KOH solution: (a) 0.0 mL, (b) 5.0 mL, (c) 10.0 mL, (d) 12.5 mL, (e)
15.0 mL. (25 points)
A 25.0 mL solution of 0.100 M CH3COOH is titrated with a 0.200 M
KOH solution. Calculate the pH after the following additions of the
KOH solution: (a) 0.0 mL, (b) 5.0 mL, (c) 10.0 mL, (d) 12.5 mL, (e)
15.0 mL. (25 points)
Given a solution of 0.125 M CH3COOH (aq) and
a solution of 0.150 M NaCH3COO (aq), how would
you prepare 100.0 mL of a buffer solution with a pH of 4.400?
pKa = 4.740 for CH3COOH
(aq).
Select one:
a. Mix 68.6 mL of the CH3COOH (aq) with 31.4
mL of the NaCH3COO (aq)
b. Mix 27.6 mL of the CH3COOH (aq) with 72.4
mL of the NaCH3COO (aq)
c. Mix 72.4 mL of the CH3COOH (aq) with 27.6
mL...