Bicarbonates in the saliva raise the pH inside the mouth.

The large algae population, which withdraws carbon dioxide from the water, also raises the pH to very high levels.

To raise the pH of a soil, you need to add alkali such as lime.

It is the most common thing used to raise the pH of things; for example, to neutralize an acid.

Too much wood ash in one place can raise the pH to the point at which plants will have trouble growing.

This releases ammonia, which raises the pH of the medium.

The lime neutralization process raises the pH of the spent acid.

This is accomplished by the addition of more lime to raise the pH until the remaining copper precipitates.

Lime raises the pH of the soil, making it more alkaline.

If allowed to accumulate, ammonia would raise the pH in cells to toxic levels.