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Coke is acidic; a red color.
dark green
If it is pure water, it doesn't change.
yes but, pH paper was not made to be used again and again Your results will not be as accurate
The answer isn't so simple. There are various kinds of pH paper. However, I presume you are referring to litmus paper which is the widest distributed form. Acetic acid has no effeect on red litmus paper but turns blue litmus red
orange
Otgfcch
blue litmus remains blue while red litmus changes to blue
Coke is acidic; a red color.
blue
The litmus paper will turn red.
The color become blue.
blue
blue
dark green
Red Litmus paper would turn blue. Most cleaners are basic. Glass cleaner generally contains ammonia (NH4) which is basic when in solution.
It would turn Green