The PH scale
The pH scale is a measure of how acidic or basic a solution is. It ranges from
0-14, with zero being the most acidic and 14 being the most alkaline. 7, being
exactly in the middle, is what would be termed as neutral.
Any number less than seven is considered to be acidic – the lower the
number,the more acidic the substance. 4 -6 would be considered ‘weakly
acidic’. Any number higher than seven is considered to be alkaline – the
higher the number, the more alkaline the substance. 8-10 would be
considered ‘weakly alkaline’.
Substances which are very strongly acidic or alkaline tend to be reactive and
can be even cause chemical burns, if not handled with care.