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'''Litmus paper''' is a chemical indicator made by treating paper with an extract of various lichens. It turns red in solutions
'''Litmus paper''' is a chemical indicator made by treating paper with an extract of various lichens. It turns red in [[acid]]ic solutions
with a Ph below 4.5 and blue in solutions with a Ph above 8.3.
with a Ph below 4.5 and blue in [[base|basic]] solutions with a Ph above 8.3.
[[Category:Science]]
[[Category:Science]]