Answer:7
Explanation:
H+ concentration of solutions is related to pH as -
[H+] = antilog(-pH)
For pH = 4,
[H+] = antilog(-4)
[H+] = 10^-4 M
For pH = 10,
[H+] = antilog(-10)
[H+] = 10^-10 M
When these 2 solutions are added, concentration of the mixture will be -
[H+] = √(10^-10 × 10^-4)
[H+] = √(10^-14)
[H+] = 10^-7 M
So now, pH of the mixture will be
pH = -log(10^-7)
pH = 7
