Question
What colour does litmus paper change to when it is dipped in an acid?
Answer
4.7
(303 Votes)
Preston
Master · Tutor for 5 years
Answer
Red
Explanation
Litmus paper is a pH indicator, used to test materials for acidity. Litmus paper comes in two colors: blue and red. Blue litmus paper turns red under acidic conditions (pH below 7), and red litmus paper remains red. If a material is neutral (pH 7), both blue and red litmus paper will not change color. Conclusively, when litmus paper meets an acid, it will turn red.