It is an easily reversible chemical reaction known as a redox reaction.
The blue color is due to blue color is due to I2+ cation. The iodine has been oxidized by an oxidizing agent. It can be reduced back to I2 in the reverse reaction.
If you add iodine to a potato, the iodine will react with the starch present in the potato. This reaction will result in a color change, turning the potato a blue-black color where starch is present. This can be used as a test to detect the presence of starch in foods.
No when you but iodine with sarch for example a potato the starch reacrs with the iodine and it turns black
-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
When you pore iodine on a piece of bread, the bread will turn black. Why? Because, the iodine has a chemical reaction with the starch in the bread. This method is great to find out if a food contains starch (I suggest a potato to try next!).
Crisps are made from potatoes which are very high in starch. When iodine is added to starch it forms a complex with it and results in a purplish color. you get the same thing if you put an iodine sol'n on bread or cornstarch.
Mashing a potato is a physical change because it's the same substance (the potato is still a potato) but in a different form.- - - - -Making mashed potatoes from fresh potatoes is both a chemical and a physical change: there are many chemical changes that occur when you cook a potato, and physical because it doesn't look anything like it did when you started.
Cooking a potato is a physical change because it undergoes a change in form or appearance, but its chemical composition remains the same. Cooking causes the potato's starches to gelatinize and its proteins to denature, but no new substances are formed.
Basically it is an Chemical reaction due to that it change it physically too. It is a chemical.
It is a chemical change - oxidisation.
Baking a potato is a physical change because the potato's chemical composition remains the same. The heat from the oven simply alters the texture, color, and taste of the potato without creating any new substances.
Yes, rotting potato is a chemical change because it involves the breaking down of organic compounds in the potato through chemical reactions, resulting in the formation of new substances such as gases and liquid compounds.
Being ductile, malleable, freezing, melting are some examples of physical changes of a substance. Physical changes do not form a new substance while chemical changes do. Examples of chemical changes are a rusting nail and combustion.
iodine solution
It is a physical change because the texture of the potato has a been changed after it was cooked.
Yes, your changing the texture of the inside from a more harder on to that of a bit more softer.
If you add iodine to a potato, the iodine will react with the starch present in the potato. This reaction will result in a color change, turning the potato a blue-black color where starch is present. This can be used as a test to detect the presence of starch in foods.
The colour expected would be Black, as a reaction between the iodine and potato starch occurs to give a black complex.