China Rose as a Natural Indicator
China Rose, also known as Hibiscus, can be used as a natural indicator in acid-base titrations due to its ability to change color in response to the pH of a solution.

How does it work?
- China Rose contains pigments called anthocyanins which are sensitive to changes in pH.
- In an acidic solution, the anthocyanins appear red or pink.
- In a basic solution, the anthocyanins turn blue or purple.

Application in titrations
- When titrating a strong acid with a strong base, China Rose can be used to visually indicate the endpoint of the titration.
- As the base is added to the acid, the color of the solution changes from red to purple when the equivalence point is reached.

Advantages of using China Rose
- Environmentally friendly and non-toxic compared to synthetic indicators.
- Easily accessible and cost-effective.
In conclusion, China Rose can be a reliable and natural indicator in acid-base titrations, providing a visual cue for the endpoint of the reaction. Its color-changing properties make it a useful tool in the laboratory for determining the acidity or basicity of a solution.