The pH of Orange Juice varies from about 3.3 to 4.2, which makes it weakly acidic. This would be orange on many UI papers, but they do vary so always compare the colour with the chart supplied.
pH paper changes color is varying acid-base levels. It can do this because the paper is impregnated with acid-base sensitive chemicals.
Red, showing that the solution is acidic.
As orange juice being an acidic solution, it turns blue litmus into red.
Red/Orange because OJ is acidic.
It would remain red, red litmus paper only reacts to blue in the presence of a base. Lemon juice is acidic and thus wouldn't turn the paper a color. If blue litmus paper was used in the lemon juice it would turn red. Consequently dipping blue litmus paper in a base won't change the color because it does not react with bases, only acids.
Mauve on the pH paper Merck art. 9565.
Blue litmus paper would turn red in orange juice.
Red, showing that the solution is acidic.
Apple juice is a type of citric acid so it would turn blue litmus paper redish.
Yes it will.
Orange juice is acidic.
As orange juice being an acidic solution, it turns blue litmus into red.
Red/Orange because OJ is acidic.
Red
Litmus paper turn to red color.
a few weeks
not as fast as water bleach or orange juice
orange and red