Check out the cool chemistry stuff you can do with a red cabbage ... The liquid turns a cranberry red color. This color change tells you that lemon juice has an acid in it. 7. Now, use the tip of a ...

Some molecules respond to light in a matter of seconds. In the case of this dithienylethene compound, ultraviolet light triggers a ring-forming reaction, turning the colorless solution deep red.

This phenomenon of thermochromic switching opens the door to applications such as smart coatings and heat-sensitive inks that change color at different temperatures. The scientists hope their ...

Some chemical reactions change temperature, change color, produce a gas, or make a solid from two liquids. Try this reaction and see what it does! Pour 1 tablespoon of hydrogen peroxide into a cup.

A colour change might take place when two substances react. It can also happen when a compound is broken down by heating it. This is called thermal decomposition. Watch this video to see how the ...

A capped 2-liter plastic bottle containing a clear, colorless liquid is shaken. The liquid turns a deep blue color. At rest, the liquid returns to colorless. The cycle can be repeated many times. Ask ...