a) A buffer solution is prepared by adding 55 mL of a 0.095 M solution of potassium benzoate, KC6H5CO2, into 110 mL of 0.20 M benzoic acid, HC6H5CO2. What is the pH of this buffer solution? (Benzoic Acid: Ka = 6.5 x 10-5) a.pH = 6.77 b.pH = 4.18 c.pH = 3.89 d.pH = 3.56 b) A buffer solution is prepared by adding 75 mL of 0.15 M sodium phenolate, NaC6H5O, to 100 mL of 0.35 M phenol, HC6H5O. What is the pH of this buffer? (Phenol Ka: 1.3 x 10-10 M) a.pH = 9.87 b.pH = 5.43 c.pH = 8.76 d.pH = 9.26 c)Two Part Question: A buffer solution is prepared by adding 60 mL of 0.15 M lithium fluoride, LiF, to 100 mL of 0.175 M hydrofluoric acid, HF. Part 1: What is the pH of this buffer solution? Part 2: What is the pH of this buffer solution if 30 mL of 0.1 M nitric acid, HNO3, is added? (Hydrofluoric Acid Ka = 7.1 x 10-4) a.2.85; 2.61 b.2.61; 2.86 c.3.44; 4.19 d.4.19; 3.44 d) Two Part Question: A buffer solution is prepared by adding 100 mL of 0.25 M hydrocyanic acid, HCN, to 30 mL of 0.2 M sodium cyanide, NaCN. Part 1: What is the pH of the buffer solution? Part 2: What is the pH of buffer solution after adding 25 mL of 0.15 M potassium hydroxide, KOH? (Hydrocyanic Acid Ka = 4.9 x 10-10) a.7.98; 8.11 b.8.11; 7.98 c.8.68; 8.97 d.8.97; 8.68
a) A buffer solution is prepared by adding 55 mL of a 0.095 M solution of potassium benzoate, KC6H5CO2, into 110 mL of 0.20 M benzoic acid, HC6H5CO2. What is the pH of this buffer solution?
(Benzoic Acid: Ka = 6.5 x 10-5)
a.pH = 6.77
b.pH = 4.18
c.pH = 3.89
d.pH = 3.56
b) A buffer solution is prepared by adding 75 mL of 0.15 M sodium phenolate, NaC6H5O, to 100 mL of 0.35 M phenol, HC6H5O. What is the pH of this buffer?
(Phenol Ka: 1.3 x 10-10 M)
a.pH = 9.87
b.pH = 5.43
c.pH = 8.76
d.pH = 9.26
c)Two Part Question: A buffer solution is prepared by adding 60 mL of 0.15 M lithium fluoride, LiF, to 100 mL of 0.175 M hydrofluoric acid, HF. Part 1: What is the pH of this buffer solution? Part 2: What is the pH of this buffer solution if 30 mL of 0.1 M nitric acid, HNO3, is added?
(Hydrofluoric Acid Ka = 7.1 x 10-4)
a.2.85; 2.61
b.2.61; 2.86
c.3.44; 4.19
d.4.19; 3.44
d) Two Part Question: A buffer solution is prepared by adding 100 mL of 0.25 M hydrocyanic acid, HCN, to 30 mL of 0.2 M sodium cyanide, NaCN. Part 1: What is the pH of the buffer solution? Part 2: What is the pH of buffer solution after adding 25 mL of 0.15 M potassium hydroxide, KOH?
(Hydrocyanic Acid Ka = 4.9 x 10-10)
a.7.98; 8.11
b.8.11; 7.98
c.8.68; 8.97
d.8.97; 8.68
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