Test River pH: Make an Indicator at Home

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Discussion Overview

The discussion revolves around methods for creating a homemade pH indicator to test the pH of river water. Participants explore various natural materials and their potential effectiveness in indicating pH levels.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant suggests boiling red cabbage to create a pH indicator, noting that the resulting water turns purple and is sensitive to pH changes.
  • Another participant inquires about the expected pH of the river and its pollution status, indicating a concern for environmental conditions and biological presence in the water.
  • A different participant recalls using "ink weed" berries to make an indicator that changes color in alkaline conditions, suggesting alternative natural sources for pH testing.

Areas of Agreement / Disagreement

Participants present multiple methods for creating a pH indicator, but there is no consensus on the best approach or the expected pH levels of the river water.

Contextual Notes

Unresolved questions include the specific pH range of the river and the potential impact of pollution on the water's chemistry.

Jason49
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I need to test the ph of river. I need a method of making an indicator that I can make at home. Please help !
 
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Welcome to PF;
Have you tried googling "make your own ph indicator"?

If you boil red cabbage - the water turns purple - the color is sensitive to pH.
 
Thanks
 
Jason49 said:
I need to test the ph of river. I need a method of making an indicator that I can make at home. Please help !
Do you know approximately what pH to expect? Is the river badly polluted? Is there any animal life present in the water?

I remember making an indicator from the purple juice of "ink weed" berries. It turned green in an alkali, I think.
 

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