Answer:
pH = 4
Explanation:
Given that,
The concentration of [H⁺] is [tex]10^{-4}\ M[/tex]
We need to find the pH of the solution. We know that,
[tex]pH=-log[H^+][/tex]
Also,
HNO3 → H+ + NO-3
Put all the values,
[tex]pH=-log[1\times 10^{-4}]\\\\pH=4[/tex]
So, the pH of the solution is equal to 4.