Question

What is the color of hibiscus petals in acid,base and neutral indicator?

Answer 1

China rose or hibiscus extract show following identification with acid, base and neutral as follows :

a. It is pink in neutral .
b. It is magnets on color for acidic solutions.
c. It is green in color for basic solution.

Answer 2

Required Answer:

Hibiscus Petals ;

As hibiscus flower contains the colour pigment anthocynanin, not only can it be used as a natural indicator.

Procedure,

1. Cut approximately 10 mature hibiscus flowers.
2. Remove the stigma, and detach the leaves, so as to have only the red petals remaining.
3. Put them in a container, and pour approximately 6ml of ethanol or surgical spirit; the latter works best.
4. Crush the petals using an appropriate implement, such as a mortar and pestle. Crush until all of the liquid has been extracted from the petals.
5. Filter the solution, and you have the reddish indicator ready.
6. View results in sunlight if possible.

Results,

• The Acid turns into Highlighted Red.
• The Base turn into Dark Green ( Almost Black )
• The Neutral turn into No Change.