red
Depends on the litmus paper. Red litmus will not turn but blue litmus will turn redish pink.
Acid can't turn red litmus paperbur base canturn it blue .
Hydrochloric acid will keep litmus red - it needs alkali to turn it blue
hydrochloric acid usually has pH 1 which turns litmus Red
Litmus paper will turn red in dilute hydrochloric acid, indicating that the solution is acidic.
Red!
In an acid solution the blue litmus paper become red.
Sulphuric acid turns blue litmus paper red, indicating its acidic nature.
Stomach acid is acidic, so litmus paper would turn red when exposed to it.
Because Vinegar is an acid, the litmus paper would turn red
Litmus turns red in sulfuric acid.
Red litmus solution would turn blue if dipped in phosphoric acid, because phosphoric acid is acidic and will cause the litmus paper to change color from red to blue.