Wednesday, December 20, 2006

Acids and Alkalis


Today was another challenging Science Club meeting. The kids were very unfocused and there were only a couple of activities that pulled even half of them in. My four were all at various stages of recovering from illnesses, as were several of the other kids, and that certainly didn't help. However, I wanted to share this photo of our indicator solution. We boiled purple cabbage and decanted off the water to use for testing the pH of various mystery solutions. I'd never really gone through the business of creating a range of indicator colours side by side -- but we did today and were thrilled with the striking colours. Shown above are solutions of pH ~ 5, 6, 7, 8 and 9.

1 comment:

  1. We just did something similar this week. Fred loved the vivid colour changes. I've posted pictures of our extensive line-up of colours.

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