Another question about Iodine...?

Question

I'm still working on my Iodine report.
Does rust have Iodine in it, or does it just create rust???

?

Answer 1

rust is Fe and O Iodine has nothing to do with it
here is some information on iodine
Atomic number
53

Atomic mass
126.9045 g.mol -1

Electronegativity according to Pauling
2.5

Density
4.93 g.cm-3 at 20°C

Melting point
114 °C

Boiling point
184 °C

Vanderwaals radius
0.177 nm

Ionic radius
0.216 nm (-1) ; 0.05 nm (+7)

Isotopes
15

Electronic shell
[ Kr ] 4d10 5s25p5

Energy of first ionisation
1008.7 kJ.mol -1

Standard potential
+ 0.58 V ( I2/ I- )

Discovered
Bernard Courtois in 1811




Iodine
Iodine is a non-metallic, dark-gray/purple-black, lustrous, solid element. Iodine is the most electropositive halogen and the least reactive of the halogens even if it can still form compounds with many elements. Iodine sublime easily on heating to give a purple vapour. Iodine dissolves in some solvents, such as carbon tetrachloride and it is only slightly soluble in water.

Applications

Iodine is used in medical treatment as tincture and iodioform, it is employed in the preparation of certain drugs and in the manufacture of some printing inks and dyes. Silver iodine is used in photography. Iodine is added to almost all the table salt and is used as a supplement to animal feed. It is also an ingredient of water purification tablets that are used for drinking water preparation.
For many of these uses iodine is turned into iodides.

Iodine in the environment

Iodine is added to nearly any kind of salt that is applied. It is an ingredient of bread, sea fish and oceanic plants. Iodine is naturally present in the ocean and some sea fish and water plants will store it in their tissues.

Iodine can be found naturally in air, water and soil. The most important sources of natural iodine are the oceans. About 400.000 tonnes of iodine escape from the oceans every year as iodide in sea spray or as iodide, hydrichloric acid and methyl iodide, produced by marine organisms. Much of it is deposited on land where it may become part of the biocycle.

There are some iodine-containing minerals, such as alutarite, found in Chile and iodargyte, found in Colorado, Nevada and New Mexico. World-wide industrial production of iodine is about 13.000 tonnes per year, mainly in Chile and Japan, plus small amounts in Russia and USA. Iodine is extracted from natural brines and oil brines, which have up to 100 ppm of the element or form chilean nitrate deposits. Known reserves of easily accessible iodine amount is around 2 million tonnes.

Health effects of iodine
Many medicines and cleansers for skin wounds contain iodine.

Iodine is a building material of thyroid hormones that are essential for growth, the nervous system and the metabolism. Humans that eat little to no bread can experience iodine shortages. The function of the thyroid gland will than slow down and the thyroid gland will start swelling up. This phenomenon is called struma. This condition is rare now as table salt is dosed with a little iodide. Large quantities of iodine can be dangerous because the thyroid gland will labour too hastily. This affects the entire body; it causes disturbed heartbeats and loss of weight.

Elemental iodine, I2, is toxic, and its vapour irritates the eyes and lungs. The maximum allowable concentration in air when working with iodine is just 1 mg m-3. All iodides are toxic if taken in excess.

Iodine 131 is one of the radionuclides involved in atmospheric testing of nuclear weapons, which began in 1945, with a US test, and ended in 1980 with a Chinese test. It is among the long-lived radionuclides that have produced and will continue to produce increased cancers risk for decades and centuries to come. Iodine 131 increases the risk of cancer and possibly other diseases of the thyroid and those caused by thyroid hormonal deficiency.





Environmental effects of iodine

Iodine in air can combine with water particles and precipitate into water or soils. Iodine in soils will combine with organic matter and remain in the same place for a long time. Plants that grow on these soils may absorb iodine. Cattle and other animals will absorb iodine when they eat these plants.

Iodine in surface water will vaporize and re-enter the air as a result. Humans also add iodine gas to the air, by burning coal or fuel oil for energy. But the amount of iodine that enters the air through human activity is fairly small compared to the amount that vaporizes from the oceans.

Iodine may be radioactive. The radioactive isotopes are formed naturally during chemical reactions in the atmosphere. Most radioactive isotopes of iodine have very short half-lives and will reshape into stable iodine compounds quickly. However, there is one radioactive form of iodine that has a half-live of millions of years and that is seriously harmful to the environment. This isotope enters the air from nuclear power plants, where it is formed during uranium and plutonium processing. Accidents in nuclear power plants have caused the release of large amounts of radioactive iodine into air.

Answer 2

Well,
I am a Chemist. Iodine does not create rust. Iodine is a dye and is used in microbiology to "stain" a slide for a microscope so that you can see the cultures. Rust is also known as Iron Oxide to us chemists. Your car gets rust on it when the paint comes off and sits in the rain for to long. Hope this helps.

Sincerely,
Wee Man.

Answer 3

Rust is iron oxide and iron hydroxide. Iodine has nothing to do with it, although in the presence of iodine, iron can be oxidized at a faster rate.

Answer 4

Rust is iron oxide - no iodine in it at all.

Answer 5

When chlorine is passed over potassium iodide a brown sol is formed( iodine is displaced from KI to form KCl and I )

Answer 6

I believe the nucleus is the darkest- but it depends on what kind of cell you are referring to. If it is Eukaryotic, then I would say nucleus. If it is Prokaryotic, then that's a whole different story. Prokaryotic cells, as you may know, have no nucleus, but just a bunch of stuff like: nuclioid (DNA), flagella (flagellum), a cell wall and membrane, and rhibosomes. Prokaryotic cells are bacteria/cingle-celled organisms, while Eukaryotic cells are found in muti-celled organisms such as you and I. When you look at a prokaryotic cell, the darkest would probably be the nucleolus which is kind of in the center of the cell.