What kind of chemical experiment will cause the chemicals to change colors?
93048
Mystery kool-aid and H2O.
761935
when in a chemical reaction
945221
You will get a greenish precipitate of copper carbonate, which is definitely a chemical change - a new substance has been formed.
487926
poison? bleach? acid? ect...
442218
Crystal Violet \nIodine Solution  \nEthanol\nSafranin \nWater \n\nGram -ve = pink\nGram +ve = purple
937754
Something involving atomic spectra.  For example see\nhttp://www.fas.harvard.edu/~scdiroff/lds/QuantumRelativity/StreetLampSpectra/StreetLampSpectra.html
607087
The color of a substance is based on the light that it emits, typically after absorbing photons from an external source.  The movement of electrons from one energy level to another is what is typically responsible for the light we see.  If you ionize a substance, you affect the energy levels that are available to an electron to be excited to, or relax down to, and hence you affect its color.
874555
Here are some experiments that I found:
531897
No, it depends on what chemicals are in each color.
282061
"Color Changing UV Beads"\nhttp://www.stevespanglerscience.com/product/1350\n\n"The UV-sensitive beads contain a pigment that changes color when exposed to ultraviolet radiation from the sun. The energy beads are not affected by light from light bulbs that do not emit ultraviolet light. The beads will remain white indoors, when shielded from sunlight."
164495
this experiment is called calorimetry
344738
Actually, this is a really hard one: color arises from light having different frequencies, and the different colors are reflected with varying efficiency from various substances: so a red color arises from a substance that reflects well low frequencies (red) and absorbs higher ones (blue and yellow).\n\nNow what determines in which way a given substance reflects light at different frequencies? That varies a lot: for starters, some atoms *are* in fact colored, that is, they reflect one frequency more  than another: chlorine gas is an example. This is also frequently the case for molecules (dyes). On the other hand, it is also often caused by some effect that cannot be traced back to the individual parts that make up the whole: think of a sand heap: clearly, none of the grains is a heap, nor is there any specific grain which gives the heap its peculiar properties. What makes a sand heap is just the large number of grains, all acting mutually one upon the other. A crowd, similarly, often does things you cannot really explain in terms of the individuals that make it up. Similarly, for example, a large number of copper atoms find a weird way of reflecting certain frequencies much more than others: it is a property of the whole substance that cannot be reduced to the individual copper atoms. Color, by the way, is not at all the only such property.
1009358
U r asking for a science project.?\nI have an idea for the science project for chemistry side
380887
lol, last minute lab write ups. afaik enzymes dont change colour, as they are not supposed to change so id bet there is something else that the enzyme works on. better put up the other reagents to get a better answer
454489
i do not know about an element but u do get dyes which will emit in the wavelengths u mentioned if excited by UV.
207847
It's a Chemical/Fusion reaction...
831792
You can test growing different types of plants in different types of light or kinds/amounts of fertilizer.\n\nOne science project I saw that was visually interesting was done by a student who put white roses in different saturations of colored water (the white flower will turn colors.)\n\nOr could try growing mold on different kinds of food in different containers...putting eggs in different amounts of vinegar...\n\nGood luck.