Chemistry - a unique and interesting science, with which you can explain many of the processes taking place around us in life.For example, why iron rusts slowly, and why aluminum spoon heats up so fast, if dipped in hot tea.Chemistry surrounds us absolutely everywhere: acetic acid or vinegar, sodium chloride, or table salt known to all, as well as substances such as iodine, chlorine, alcohol, and many others.But there is a chemical substance which is known to everyone, and it is said starch.Starch can also be obtained by chemical, but most of it is extracted from potatoes.Let's take a closer look, everything connected with it, from the chemical formula and ending its properties and how starch can be identified.
starch MDM formula is as follows: S6N10O5, has a number of interesting properties.For example, everyone's favorite pudding freezes only for the reason that it contains a sufficiently large amount of starch.It looks like a normal starch powder, odorless, virtually devoid of taste, and the interesting thing is that it squeaks when its a little rub.This physical property of the starch because the starch molecule is large enough.
Generally starch formula and some of its properties were discovered relatively recently.Starch produced by plants, and not only potatoes, but also others such as, for example, corn and wheat.The potato starch contains only twenty percent, and wheat and corn grain it exceeds the mark of seventy percent.Starch is formed when the compound is in photosynthesis six molecules of carbon dioxide and five molecules of water, whereupon a starch molecule one and six molecules of oxygen.
As mentioned above, the chemical formula of starch contains six carbon atoms, hydrogen atoms of ten and five oxygen atoms.This suggests not only that the starch molecules is very large, and that it has a totally organic origin, that is, of belonging to a branch of chemistry, called organic.This material is considered difficult, refers to a list of polysaccharides although sugar or similar substances it is not.Also starch refers to organic substances containing oxygen or otherwise - the oxygen-containing organic compounds.
structural formula of starch is also considered difficult, its structure can be found on the Internet, as pass on the letter it is simply impossible.One can only say that starch, more precisely its formula, contains several OH-groups, each of which is connected to a carbon atom.Many people confuse this molecule to any alcohol when they hear about the OH group, but in fact lies in the molecule S6N10O5 starch.
If you want to recognize the starch, then you do not need a lot of a long time to think about it.Qualitative reaction for the presence of starch in the medium is as follows: In a tube was dropped a few drops of iodine solution.If the solution is immediately Sneem, you no doubt can sign test tube and be sure that it starch.If you want to check out this reaction in lomashnih conditions, then take a small potato, cut it, and then carefully pipette drip a few drops of iodine (that are sold in pharmacies to cauterize wounds).After some time you will see the obvious effect of qualitative reaction for starch: potato in a place where iodine was gradually begin to turn blue.
So, now you know about a lot of starch (starch that such a formula, properties, and quality response).Of course, all the above information is not complete, but if you are ready to set off on organic chemistry, it will certainly help you.
