Created page with ''''Litmus paper''' is a chemical indicator made by treating paper with an extract of various lichens. It turns red in solutions with a Ph below 4.5 and blue in solutions with a P…'
'''Litmus paper''' is a chemical indicator made by treating paper with an extract of various lichens. It turns red in solutions
with a Ph below 4.5 and blue in solutions with a Ph above 8.3.