What is the H plus of a solution with APH 27.9 question mark

The H plus concentration of a solution can be calculated using the formula pH = -log[H+]. If the pH of a solution is 27.9, the H plus concentration can be calculated by rearranging the formula:

[H+] = 10^(-pH)
[H+] = 10^(-27.9)
[H+] = 7.94 x 10^(-28) mol/L

Therefore, the H plus concentration of a solution with a pH of 27.9 is 7.94 x 10^(-28) mol/L.