1. If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2solution is 3.11 which of the following is true.
- [HCHO2] < [NaCHO2]
- [HCHO2] = [NaCHO2]
- [HCHO2] << [NaCHO2]
- [HCHO2] > [NaCHO2]
-it is not possible to make a buffer of this pH from HCHO2 andNaCHO2

2. You wish to Prepare an HC2H3O2 buffer with a pH of 4.24. If thepKa of this is 4.74, what is the ratio of C2H3O2-/HC2H3O2?

3. A Buffer Solution is 0.100 M in both HC7H5O2 and LiC7H5O2 andhas a pH of 4.19. Which of the following pH values would you expectfrom the addition of a small amount of a dilute solution of astrong base?
- 3.89
- 3.69
- 5.69
- 4.49
- There is not enough information.

4. Which of the following acids (listed with pKa values) and theirconjugate base would form a buffer with a pH of 8.10?
- HC7H5O2, pKa=4.19
- HF, pKa=3.46
- HClO, pKa=7.54
- HCN, pKa=9.31
- HClO2, pKa=1.96

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Collen VonLv2

21 Apr 2020

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Related questions

1. Which of the following acids (listed with pKa values) andtheir conjugate base would form a buffer with a pH of 8.10?

A.	HC₇H₅O₂, pKa = 4.19
B.	HF, pKa = 3.46
C.	HClO, pKa = 7.54
D.	HClO₂, pKa = 1.96

2. When titrating a strong monoprotic acid and KOH at 25

1. A Buffer Solution is 0.100 M in both HC7H5O2 and LiC7H5O2 andhas a pH of 4.19. Which of the following pH values would you expectfrom the addition of a small amount of a dilute solution of astrong base?

- 3.89
- 3.69
- 5.69
- 4.49
- There is not enough information.

2. Which of the following acids (listed with Ka values) and theirconjugate base would form a buffer with a pH of 2.34?
- HC7H5O2, Ka=6.5 x 10^-5
- HF, Ka=3.5 x 10^-4
- HClO, Ka=2.9 x 10^-8
- HCN, Ka=4.9 x 10^-10
- HClO2, Ka=1.1 x 10^-2

3. A 1.0 L buffer solution is 0.250 M HC2H3O2 and 0.050 MLiC2H3O2 . Which of the following actions will destroy thebuffer?
a.) adding 0.050 moles of LiC2H3O2
b.) adding 0.050 moles of HC2H3O2
c.) adding 0.050 moles of HCl
d.) adding 0.050 moles of NaOH
e.) none of the above will destroy the buffer

4. A 1.0 L buffer solution is 0.050 M HC2H3O2 and 0.250 MLiC2H3O2 . Which of the following actions will destroy thebuffer?
a.) adding 0.050 moles of LiC2H3O2
b.) adding 0.050 moles of HC2H3O2
c.) adding 0.050 moles of HCl
d.) adding 0.050 moles of NaOH
e.) none of the above will destroy the buffer