<span>When pKas of polyprotic intermediates have a difference of 2 or more you just average them using the equation: pH = (pKa2 + pKa3) / 2 </span>
<span>pKa2 = -log(Ka2) ; pKa3 = -log(Ka3) </span>
<span>so, for this problem, REGARDLESS OF THE CONCENTRATION GIVEN, the answer is: </span>
<span>pH = (7.2076+12.3767) / 2 </span>
<span>pH = 9.79</span>
Verbal and nonverbal.
They would look for shakiness of the voice (verbal) or darting eyes (nonverbal), and other things to that same effect.
Answer: C
Explanation: This is because of a nice thing called guessing
Hopes this helps:
Answer: So the pH of the solution is 4.
