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Chemical Magic: The Disappearing Rainbow 🌈🧪🫠
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Experience the wonder of chemistry with this incredible experiment that showcases the power of acid-base indicators in generating vibrant colors in water. Learn how to create your own rainbow of colors using simple ingredients and chemical reactions. Subscribe to our channel for more exciting science experiments!
Recipes for indicator solutions:
Red: 1.5 g of p-nitrophenol and 0.75 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Recipes for indicator solutions:
Orange: 2 g of p-nitrophenol and 0.15 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Yellow: 1 g of p-nitrophenol in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Green: 0.2 g of thymolphthalein and 2 g of p-nitrophenol in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Blue: 0.2 g of thymolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Violet: 0.2 g of thymolphthalein and 0.45 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
For further directions on how to do this experiment see Shakhashiri, B. Z., Chemical Demonstrations, Volume 3; University of Wisconsin: Madison (1989).
Recipes for indicator solutions:
Red: 1.5 g of p-nitrophenol and 0.75 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Recipes for indicator solutions:
Orange: 2 g of p-nitrophenol and 0.15 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Yellow: 1 g of p-nitrophenol in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Green: 0.2 g of thymolphthalein and 2 g of p-nitrophenol in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Blue: 0.2 g of thymolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
Violet: 0.2 g of thymolphthalein and 0.45 g of phenolphthalein in 30 mL of ethyl alcohol. Add a few drops of 1 M HCl to acidify.
For further directions on how to do this experiment see Shakhashiri, B. Z., Chemical Demonstrations, Volume 3; University of Wisconsin: Madison (1989).
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