Science
Acid-Base Indicator Card
Used by developers, writers, and creators worldwide.
An acid-base indicator card generator introduces the common chemical indicators and the colours they turn in acids and bases. Indicators are substances that change colour depending on pH, and they are how chemists and students tell at a glance whether a solution is acidic or basic. This tool pairs each indicator with its colour in acid and in base, plus a short note, so the colour changes are easy to learn. Click generate to study an indicator, then collect them all. It is ideal for chemistry students, teachers, and anyone revising acids and bases. Each indicator is matched with its genuine colour changes, so you can trust what you memorise. A handy anchor is litmus, the classic: it turns red in acid and blue in base, which is the rule generations of students have learned, and the other indicators each have their own distinctive change to remember.
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How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Click Generate to produce an indicator card.
- Learn its colour in acid and in base.
- Collect all the indicators.
- Match an indicator to its pH range.
Use Cases
- •Learning acid-base indicators
- •Revising chemistry for an exam
- •Preparing for a titration practical
- •Quizzing yourself on indicator colours
- •Teaching acids and bases
Tips
- →Litmus: red in acid, blue in base.
- →Phenolphthalein: colourless to pink.
- →Universal indicator shows a full range.
- →Pick an indicator for the right pH range.
FAQ
what is a chemical indicator
An indicator is a substance that changes colour depending on the pH of a solution, showing whether it is acidic or basic. Indicators are essential in titrations and are a simple, visual way to test acidity in the lab and classroom.
are the colour changes accurate
Yes. Each indicator is paired with its genuine colour in acid and in base, so litmus is correctly red in acid and blue in base, and phenolphthalein is colourless in acid and pink in base. The pairings are reliable for study.
why are there so many indicators
Different indicators change colour at different pH ranges, so chemists choose one that changes near the point they need to detect. For a titration, picking an indicator that changes at the right pH gives a sharp, accurate endpoint.