1. pluck 10-12 full hibiscus flowers
2. remove the sepals stigma so as to remain only with the petals
3. boil the petals in minimum water so the color leaches out or crush the petals in surgical spirit.
4. filter the solution
5. your indicator is ready
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You can make a pH indicator using hibiscus by steeping hibiscus petals in hot water to make a tea. The resulting tea will change color depending on the pH of the solution it is added to, turning red in acidic solutions and green in basic solutions.
pH indicators change their color according to the pH of a solution.
pH indicators are classified based on the pH range over which they change color. They can be classified as either acidic, basic, or universal indicators. Acidic indicators change color in acidic solutions, basic indicators change color in basic solutions, and universal indicators change color over a wide pH range.
Gumamela (Hibiscus) plants can be used as pH indicators. The flowers change color depending on the pH of the solution they are placed in, making them useful in determining acidity or alkalinity levels. For example, a red gumamela flower may turn violet in acidic solutions and green in alkaline solutions.
Indicators are used frequently for testing pH; but many other indicators exist for other compounds or ions.
pH indicators change the color depending upon acidity or basicity.