While pure water has a neutral pH of 7, ocean water typically has a pH between 8.1 and 8.3. This means that it contains more hydroxide ions (OH-) than hydrogen ions (H+).

However, the pH of ocean water can fluctuate depending on various factors such as:

* Depth: Surface water tends to be more alkaline than deeper water.

* Location: Different geographic regions have varying pH levels.

* Pollution: Human activities can impact ocean acidity.

The ocean's alkalinity plays a crucial role in regulating the Earth's climate by absorbing carbon dioxide from the atmosphere. However, increasing levels of atmospheric carbon dioxide are leading to ocean acidification, a process where the pH of the ocean decreases.