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12 Dec 2019
Consider the titration of 80.0 mL of 0.0200 M C5H5N (a weak base; Kb = 1.70e-09) with 0.100 M HNO3.
Calculate the pH after the following volumes of titrant have been added:
(a) 0.0 mL pH =
(b) 4.0 mL pH =
(c) 8.0 mL pH =
(d) 12.0 mL pH =
(e) 16.0 mL pH =
(f) 25.6 mL pH =
PART TWO:
A buffer solution contains 0.14 mol of ascorbic acid (HC6H7O6) and 0.84 mol of sodium ascorbate (NaC6H7O6) in 2.80 L.
The Ka of ascorbic acid (HC6H7O6) is Ka = 8e-05.
(a) What is the pH of this buffer?
pH =
(b) What is the pH of the buffer after the addition of 0.07 mol of NaOH? (assume no volume change)
pH =
(c) What is the pH of the original buffer after the addition of 0.21 mol of HI? (assume no volume change)
pH =
Consider the titration of 80.0 mL of 0.0200 M C5H5N (a weak base; Kb = 1.70e-09) with 0.100 M HNO3.
Calculate the pH after the following volumes of titrant have been added:
(a) 0.0 mL pH =
(b) 4.0 mL pH =
(c) 8.0 mL pH =
(d) 12.0 mL pH =
(e) 16.0 mL pH =
(f) 25.6 mL pH =
PART TWO:
A buffer solution contains 0.14 mol of ascorbic acid (HC6H7O6) and 0.84 mol of sodium ascorbate (NaC6H7O6) in 2.80 L.
The Ka of ascorbic acid (HC6H7O6) is Ka = 8e-05.
(a) What is the pH of this buffer?
pH =
(b) What is the pH of the buffer after the addition of 0.07 mol of NaOH? (assume no volume change)
pH =
(c) What is the pH of the original buffer after the addition of 0.21 mol of HI? (assume no volume change)
pH =
Bunny GreenfelderLv2
13 Dec 2019