4.2 Understand how the pH scale, from 0–14, can be used to classify solutions as strongly acidic, weakly acidic, neutral, weakly alkaline or strongly alkaline
The ph scale is used to measure acidity and alkilinity
Solutions with a pH less than 7 are acidic
with 0 being a very strong (the strongest, really) acid
and 6 (or as the number is closer to 7) being a very weak acid
Solutions with a pH of 7 are neutral
Solutions with a pH greater than 7 are alkaline
where 8 (or as the number gets closer to 7) is a very weak alkali
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