Struggling to choose the right indicator for a titration experiment in analytical chemistry? In this tutorial video, we break down exactly how to select the most appropriate indicator based on the type of titration you’re performing. Whether it’s a strong acid–strong base or weak acid–strong base reaction, you’ll learn how to match the indicator’s color change range with the equivalence point of a titration.
There are so many different types of indicators that have a distinct colour change at varying pH levels. Choosing a ‘good indicator’ depends on the acid and base being used in the titration and the range in which indicators change color. This video will help you make sure you make the right choice of indicator to use for a variety of acid-base reactions!
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How to choose the right indicator for a titration reaction
What you’ll learn:
- What indicators are and how they work
- Common titration types and their pH curves
- How to choose an appropriate indicator for different types of reactions including:
- strong acid-strong base titrations
- strong acid-weak base titration
- weak acid-strong base titration
- weak acid-weak base titration (which should use pH meters
- How to choose between different indicators like phenolphthalein, methyl orange, bromothymol blue, and more
- Ranges you can observe ph changes in indicator
- Real examples and tips to avoid common mistakes
- How to find the end point of the titration
You might like this acid-base titration worksheet to workthrough as well.
How to choose the right indicator for a titration reaction
Acid-base titrations can be so confusing with all the different elements you need to consider. Choosing the right acid-base indicators are crucial for ensuring precise and accurate results and to avoid over or under titrating. Students need to consider the pH of the solution at the expected equivalence point of the titration and choose a suitable indicator so that the endpoint is within a specific pH range.
Perfect for high school and college chemistry students!
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