It is also iodine, as a gas.
The purple gas that forms when heating iodine crystals is called iodine vapor.
You think to iodine.
Iodine turns purple in the presence of starch. This is a common chemical test used to detect the presence of starch in substances like food or plants. When iodine comes into contact with starch, it forms a complex that appears purple in color.
You can determine if iodine entered the dialysis bag containing starch by performing a simple iodine test. Add a few drops of iodine solution to the bag. If the iodine turns blue or purple, it means that iodine has entered the bag and reacted with the starch inside.
Iodine ------------------------------------------- The element you describe sounds like iodine, a good test to make sure that it is iodine is to see if the substance sublimes. This means a solid sample of iodine will turn straight from a solid into a gas with no liquid stage.
The purple gas that forms when heating iodine crystals is called iodine vapor.
This is also iodine, as a gas.
When iodine is heated in a test tube, it sublimates, transitioning directly from a solid to a purple vapor without passing through a liquid phase. This vapor can condense back into solid iodine upon cooling, forming purple crystalline deposits on the cooler parts of the test tube. The characteristic purple color and pungent odor of iodine vapors are also noticeable during the heating process.
explain why the iodine test gave such results upon prolonged heating
The iodine test is used to test for starch. It reacts with starch to produce a purple blackish color.
it result to the formation of metal sulfates
aqueous iodine in the form of potassium iodide turns purple in the presence of starches in water.
You think to iodine.
Iodine turns purple in the presence of starch. This is a common chemical test used to detect the presence of starch in substances like food or plants. When iodine comes into contact with starch, it forms a complex that appears purple in color.
-What is the principle reason for the iodine test?Answer:-This test is used to test for starch prenest in a given solution orIodine test is a test used to determine the presence of starch in a particular substance.A positive result will yield the purple-black color.For example, adding a few drops of iodine solution to potato will seem purple-black color in this solution --->This means that the potato contains starch.by:Abdullah nasser Al-naffar
put a few drops of iodine on the subject, if it turns purple theres starch.
You can determine if iodine entered the dialysis bag containing starch by performing a simple iodine test. Add a few drops of iodine solution to the bag. If the iodine turns blue or purple, it means that iodine has entered the bag and reacted with the starch inside.