How does blue and red litmus paper work?

Answer:
basically there are two types of paper (litmus-red/blue) to test the nature of the substance. You stick a piece of litmus paper into the substance and it will turn a certain color according to the nature of the substance. It tests whether the solution is an acid, basic (alkaline) or neutral (salt)
First answer by ID3458815250. Last edit by ID3458815250. Question popularity: 4 [recommend question].