finding PH

[Isela Tamayo 3H]

How do we calculate the pH or pOH, is there an equation we should know?

[Aaron Li 1D]

The equation for calculating pH is pH = -log[H+]. [H+] is also the same as the [H3O+], which is the hydronium concentration. The equation of pOH is pOH = -log[OH-]. [OH-] is the hydroxide concentration. If you know the pH or pOH and you want to solve for the other, you can subtract the given from 14 to get the other value.

[Dillon Taing 3H]

Depending on what is given you can find pH or pOH. The equation pH = -log[H+] is used when given H+ concentration. The equation pOH = -log[OH-] is used when given OH- concentration. When either pH or pOH is found, you can find the other by subtracting by 14.

[VeronicaShepherd3B]

To calculate pH, we must find the negative log of the hydroonium ion concentration. Then to find pOH, we subtract pH from 14.