Hello, I've been struggling with this exercise because I don't know which pH result is correct.
I was given:
pKa = 10.25
[HCO-3] = 25.2 mmol/L --> 2.52 x10-3
[CO3-2] = 32.0 umol/L --> 3.2 x10-5
So, pH = pKa + log ([A-]/[HA])
The correct answer should be (the answer in the book): pH = 7.4
But I keep getting: pH = 13.1, what am I doing wrong?