I know of the 1 – 10 scale and pure water is a ‘neutral 7’ or something but what decides the number? What’s main difference between a substance at 1 and another at 10 on the scale?
In: 6
It determines how much acid/how acidic (or not) a liquid is.
This is determined mostly of how many H+ ions and OH- ion molecules are present in the liquid. When a liquid is at neutral 7, it has about the same amount of each ion
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