Answer :
Explanation:
The pH is a measure of the basicity or acidity of an aqueous solution.
We can determine the pH like this:
pH = -log [H+]
We know the concentration of H+ of our solution. So we have to take the -log of that value.
[H+] = 6.3 * 10^(-5)
pH = -log [H+]
pH = -log (6.3 * 10^(-5))
pH = 4.2
Answer: the pH is 4.2.