pH

[Philip]

How is the pH of a solution is related to its hydronium ion and hydroxide ion concentrations?

[zfinn]

The pH is the negative log of the solution's H3O+ concentration. The pOH would be the negative log of its OH- concentration, and this related to pH because pH = 14-pOH.

[Jared_Yuge]

p just means -log of something, so for pH that something is the concentration of H+ or H3O+ and the pOH is substituting in the concentration of OH-

[Amanda Mei 1B]

The pH scale is based on the self-ionization of water, where two water molecules combine to form hydronium and hydroxide ions. pH is a measurement of how acidic a solution is. A higher concentration of the hydronium ion means the solution is acidic and will have a lower pH (below 7), while a higher concentration of the hydroxide ion means the solution is basic and will have a higher pH (above 7).

[SVajragiri_1C]

By definition the pH is the -log of the concentration of hydronium atoms. It is simply a mathematical representation of the hydronium ion concentration.
The pOH is the -log of the concentration of hydroxide ions.

[Hussain Chharawalla 1G]

The higher the H+ concentration, the higher the H3O+ concentration (they are the same thing H3O means reacted with water), which results in a lower pH. Same applies for OH.

[ABombino_2J]

The higher the H3)+ concentration the lower the pH and the higher the pOH. The higher the OH- concentration the higher the pH and the lower the pOH.