Skip to main content
pH

pH

738 4.0
A number from 0 to 14 that shows how acidic or basic a liquid is
  • noun
  • /piː eɪtʃ/
  • Specialized
translation icon : pH
  • You need neutral pH soap and lint free cloths.
  • pH level
  • acidic pH
  • high pH

How do you change the pH of the global ocean?

Autoplay Next

Examples

  • What was the average change in pH among the pools over time?

    Academic text (1995)
  • The pH of the solution was tested to be 7, indicating it is neutral.

  • How do you change the pH of the global ocean?

  • The higher the pH, the more acid in the water.

  • Slowly at first, then more rapidly, the pH of the cells began to fall.

    Fiction book (1991)
  • Then we tested the pH of the river and found out it's very acidic.

    Fiction book (1991)
  • Participants measure the turbidity, pH, temperature, and dissolved-oxygen content of water from a local water source.

    Academic text (2013)
  • pH strips were used for the instant/on-spot analysis of the pH of the rumen fluid collected.

    Academic text (2013)
  • It also provides sulfur, which lowers the pH of your soil.

  • To create optimal growth conditions, it's essential to maintain a soil pH between 6 and 7.

Antonyms

23 3.9

Having a low pH like lemon juice or vinegar

neutral
  • Specialized
4 5.2

Not reacting easily with other substances

3 5.0

Not acidic, having a pH above seven like baking soda

Compounds

pH scale
  • Specialized
3.6

A number from 0 to 14 that shows how acidic or basic a liquid is, with 7 neutral

How Acidic

acidity
12 3.5
pH
  • Specialized
738 4.0
neutrality
  • Specialized
5.3
alkalinity
  • Specialized
2 6.3

Surface Forms

pH singular
pHs plural

Etymology

PH comes from the letter H, for 'hydrogen', and the letter p, which is often said to mean 'power' or 'potential', so it was meant as the 'power of hydrogen'. That's why pH is a simple number that tells how 'acidic' or 'alkaline' a liquid is.