Students made their own acid-base indicator from the purple trumpet flower (Bunga Terompet Ungu) to identify acidic and basic substances. When tested in a base, the indicator turned purple, and when tested in an acid, it turned yellow, showing its ability to distinguish between acids and bases.

1. Litmus Paper (Acid-Base Indicators) of Nature Materials in Labschool
(Bunga Terompet Ungu)
Aim
Students are able to make their own acid-base indicator that can be used to identify substances of acid / base in
everyday life
Procedure

4. Results
1. In Base
2. In Acid