In a neutral solution litmus has a purple color.
Litmus paper turn to red color.
The color of litmus paper in acidic solutions is red.
Red color in acidic solutions and blue color in basic solutions.
Coffee has an acidic pH - red with litmus paper.
I believe, that acid makes blue litmus paper turn red.
The color turn on blue.
The litmus paper will turn red.
Acid: Red litmus
The red litmus paper turns green because the acid (represented by red) and the base ( represented most commonly by blue) mix their Ph and become a nuetral. In short, red litmus paper in a base turns green.
If you are using red litmus paper, a base will turn the litmus paper blue.
turns blue litmus paper red
The water solution of iodine turn blue litmus paper to red.