Chemical change is when a substance changes into another substance.
2007-04-17 12:47:00 · 6 answers · asked by puppypoo 1 in Science & Mathematics ➔ Chemistry
No, there isn't a chemical change, there is only a physical change. The iodine and the water form a mixture. not a compund.
2007-04-24 15:56:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Mixing Iodine and water does not produce much of a change because, as mentioned previously, iodine is not very soluble in pure water and basically forms a mixture (the solubility product is about 2x10 e-13, see references below).
However, iodine does dissolve slightly. Wikipedia says:
Elemental iodine is poorly soluble in water, with one gram dissolving in 3450 ml at 20 °C and 1280 ml at 50 °C. By contrast with chlorine, the formation of the hypohalite ion (IO–) in neutral aqueous solutions of iodine is negligible.
I2+ H2O â H+ + I– + HIO (K = 2.0Ã10-13) [1]
Therefore, some minute amount of chemical change does take place (the formation of HIO and its further oxidation).
The solubility of iodine is increased by the presence of iodide ions in water and iodine in seawater (about 1,000 tons per cubic mile) is very important for human health.
You can learn more about iodine and solubility products in the listed references.
BTW, some solids do react and bond. For example, when two pieces of polished metal come into contact the bond is referred to as a metallic diffusion bond which is very important in electronics (see http://en.wikipedia.org/wiki/Metallic_bond ).
2007-04-25 02:12:07 · answer #2 · answered by xxpat 1 3 · 0⤊ 0⤋
no because water is nuetral, therefore there would be no chemical reaction. Which means no Chemical Change.
it's just to different components in one thing. sort of like sugar and flour. look the same, so you put them together. can't tell the difference. but there solids, so they can't bond. because there is no difference in the chemical composition. that have the need to change. the water and iodine together. will not have a change. because water and iodine don't have the need to exchange components. since water is already NEUTRAL. (STABLE.) so NO. lol. after writing a book.
Hope this helps.
2007-04-24 14:42:04 · answer #3 · answered by falcons_fu_09 2 · 0⤊ 0⤋
Iodine is not very soluble, but forms a brown dilute solution of aqueous iodine, which still has the formula I2. So it's a physical change.
2007-04-21 20:02:27 · answer #4 · answered by Gervald F 7 · 0⤊ 0⤋
No, there is no new substance formed. Only water with iodine in it.
2007-04-25 03:24:04 · answer #5 · answered by John F 4 · 0⤊ 0⤋
Probably
2007-04-25 00:52:55 · answer #6 · answered by Ms. Buckyball 3 · 0⤊ 0⤋