My daughter liked seeing the litmus paper change color, and she liked matching the color to the ph number on the chart.
- Vinegar has a ph of 2.
- The apple juice appears to have a ph of 3.
- Diet Coke was a 4.
- I read on another chart that black coffee is 5 (acidic), so my coffee was a big surprise - 7! - which is neutral.
- Chocolate milk - Milk has a ph of 6, but the chocolate milk made the litmus paper look, well, chocolate. And chocolate wasn't one of our color choices. :)
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