Other forms: phs
The pH is the scale that says how acidic or alkaline something is. A pH of seven, test the pH, low pH.
It runs from zero to fourteen with seven neutral, and each step is a tenfold change — so pH four is a hundred times more acidic than pH six, which is why small numbers matter so much. Blood is held between 7.35 and 7.45 or a person dies.
1nounphThe scale of how acidic or alkaline something is.
“Test the pH of the soil before you plant blueberries, which like acid ground.”
ph is a scale.
Practised in Chemistry & Elements