Answer:
3.6
Explanation:
The pH of a solution can be defined as the negative logarithm to base 10 of the concentration of hydrogen ions in the solution. In the equation form, it can be written as :
pH = -Log [H+]
In the question, we have been given the concentration of the hydrogen ions but we do not know the value of the pH. We then insert the value of the concentration into the equation.
This means [H+] = 2.5 * 10^-4
pH = -Log [ 2.5 * 10^-4] = 3.6