How do buffers really work? Add a strong acid or a strong base to a non-buffered solution and demonstrate, using a colorful pH indicator, that the pH quickly changes.
Now add the same acid and base to a buffer solution and watch how the pH stays beautifully balanced.
This demonstration allows you to teach what components are required for every buffer and then apply this to a common household buffer, Alka- SeltzerŪ. Summarize the lesson by testing the buffering ability of an Alka- SeltzerŪ solution and in another beautiful balancing act.
Materials are provided to repeat the demonstration five times.
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