ph scale
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
A numerical scale, running from zero to fourteen, used to measure how acidic or alkaline a solution is.
Test yourself
Which word fits the gap? "Pure water sits at the middle of the _____, at a neutral value of seven."
Answer: ph scale
In your own words, what does "ph scale" mean?
A numerical scale, running from zero to fourteen, used to measure how acidic or alkaline a solution is.
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