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Why did the leaf turn blue black when iodine was added in the starch test?
Wiki User
∙ 12y ago
because photosynthesis has occured in the leaf. starch is produced and turns iodine blue-black indicating the presence of starch.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agosubstances turn blue-black when iodine is added to it only if it contains starch. leaves store energy in the form of starch so it turns blue-black when iodine is added to it.
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Why do green leaves turn blue black when iodine is added?
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
What happens to bread when you put iodine on it?
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!).
What is the product of the reaction between starch and iodine?
There is a dark blue colour when iodine is added to starch instead of a yellow sort of colour when iodine is added to a substance without starch.
Which white powder turns blue-black in iodine solution?
starch
What makes iodine turn purple?
when iodine is added to a substance it turns dark blue when starch is present, and remains brown when starch is not present. This is basically because iodine forms a polypeptide complex with starch, resulting in the dark blue solution.
What is the colour of starch after iodine has been added?
The color of starch after iodine has been added is deep blue to black.
What happens when iodine is added to a starch solution?
When iodine is added to starch it turns a blackish color due to a chemical reaction.
Why do green leaves turn blue-black when iodine is added?
because there is starch present
What normally happens when iodine solution is added to starch?
it will change into blue black colours.
Why do green leaves turn blue black when iodine is added?
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
What observations do you need to expect if starch is present when testing leaf for starch?
It can be observed that when testing for starch their must be a olour change of blue black after iodine solution was added.Before the colour change was green that changed to blue black of the whole procedure is been carried out.
What happens to bread when you put iodine on it?
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!).
What is the product of the reaction between starch and iodine?
There is a dark blue colour when iodine is added to starch instead of a yellow sort of colour when iodine is added to a substance without starch.
What effect does iodine have when added directly to a leaf in an experiment?
it becomes blue black showing that starch is present.
What is the color obtained when iodine is added to starch?
Blue .
What effect does iodine have on starch?
it will turn the starch into blue black colour
Which white powder turns blue-black in iodine solution?
starch
