Starch.
does not matter once the Powder has starch it turns black and the powder can be any color
because the leaves have photosynthesized- glucose is produced. therefore, the excess glucose is converted to starch. The starch is then stored in the leaf-starch is what causes the "green" leaf to turn blue black, as iodine turns blue-black when it reacts with starch.:P
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!).
Yes, sugar does not turn blue when mixed with iodine. Iodine reacts with starch, turning it into a blue-black color. Sugar does not contain starch, so it will not have a reaction with iodine in this way.
it is a yellowish/orange colour but when iodine is present, than it will turn an dark-blue/black colour
does not matter once the Powder has starch it turns black and the powder can be any color
Iodine turns blue-black in the presence of starch.
BlackAns2:It is very unlikely that a ripe banana will have enough starch to turn iodine black. When iodine turns black, it is a positive test for the presence of starch.
it does not turn blue when mixed with iodine. I don't think there is a colour change.
If a substance didn't turn blue or black with iodine, it means that it didn't form any complex with iodine. When iodine forms a complex with the substance, the complex is generally blue in color.
Black
When iodine is added to bread, it reacts with the starch present in the bread. This reaction causes the iodine to turn a blue-black color, allowing for the detection of starch. This can be used as a test to check if the bread contains starch as an ingredient.
Iodine turns blue-black in the presence of starch.
because the leaves have photosynthesized- glucose is produced. therefore, the excess glucose is converted to starch. The starch is then stored in the leaf-starch is what causes the "green" leaf to turn blue black, as iodine turns blue-black when it reacts with starch.:P
The leaf should turn blue-black when iodine is added, indicating the presence of starch.
Iodine turns blue-black in the presence of starch due to the formation of a complex between iodine and starch molecules.
Iodine turns blue-black in color in the presence of starch.