Question

identify does the litmus paper show that the solution in the dish is an acid? if so, how do you know?

Explanation:

Litmus paper is a common indicator in chemistry. Blue litmus paper turns red in an acidic solution. Since the litmus paper in the image has changed color (assuming it was originally blue), this color - change is a key characteristic of an acid - base reaction.

Answer:

Yes, if the litmus paper was originally blue and it turned red, then the solution is an acid. This is because blue litmus paper changes to red in the presence of an acid.