Consider the following diprotic acid H2Z characterized by the following equilibria: H2Z(aq) D H+(aq) +...
Consider the following diprotic acid H2Z characterized by the following equilibria:
H2Z(aq) D H+(aq) + HZ–(aq) Ka1 = 2 x 10–5 pKa1 = 4.70
HZ–(aq) D H+(aq) + Z2–(aq) Ka2 = 4 x 10–8 pKa2 = 7.40
a. Calculate the pH of a solution of 0.085 M H2Z.
b. Calculate the pH of a solution of 0.085 M NaHZ.
c. Calculate the pH of a solution of 0.085 M Na2Z.
d. Calculate the pH of a solution composed of 0.070 M NaHZ and 0.080 M Na2Z.
Homework Answers
![@ pH of solution 0.085M HzZ ka, = 24јо ka, = 45o 8 CH+] = Kaic - | 2х6°хоо&S - 1-3 o 38) от 3 pH = -1°C +1 = - Je CJ• 30 3&х](http://img.homeworklib.com/questions/0ac75bd0-d78c-11eb-9b6b-d1337fcce29c.png?x-oss-process=image/resize,w_560)
![- 0.08 Na 12 Kaz= 4x10-8 [17] = v Kg xe = √ 4x108*0,085 CH] = 5-8309410-5 pH = -log Cht = - log (5.8309X16-5) Iph = 4.23437 p](http://img.homeworklib.com/questions/0bc075c0-d78c-11eb-b5d8-d71538af323b.png?x-oss-process=image/resize,w_560)
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Consider the following diprotic acid H2Z
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