Buffering Lakes and Streams Demonstration Kit for environmental science uses marble chips and dilute sulfuric acid solution with universal indicator to show how carbonite-rich soils neutralize acid rain.
This item can only be shipped to schools, museums and science centers
People are encouraged to “go green” and reduce environmental pollutants that cause acid rain or other hazards. Is society alone in fighting these battles? Absolutely not—nature can help! This demonstration uses marble chips and dilute sulfuric acid solution with universal indicator to show how carbonate-rich soils neutralize acid rain. Students observe a rainbow spectrum of color changes as the acid rain solution slowly filters through the calcium carbonate “rocks” and is neutralized. The universal indicator color changes from red in acid to blue-green color, indicating that the solution has become more neutral. The resulting “lake” or filtrate will also neutralize additional acid rain, indicating that a buffer is formed. Includes detailed discussion section, reproducible student worksheets and Teacher Notes.