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If iodine solution turns blue-black what substance is present?
Starch.
Why is iodine necassary in an experiment?
It turns blue-black if starch is present.
What color does iodine turn if a starch is present?
It turns a dark purple/black.
What happens when you iodine to starch?
The starch turns indigo.
What is the reason paper turns black when iodine touches it?
When iodine touches starch it turns black. The paper may contain starch.
What happens when iodine solution turns blue-black what substance is present?
Starch is present. Check a potato with iodine.
What is the chermical you test for starch?
Starch has high affinity for Iodine and in presence of iodine crystals starch turns blue from being colourless. This the fundamental that is used for chemically identifying the starch.
When iodine solution turns blue-black what substance is present?
Starch
When iodine solution turns blue black what substance is present?
Starch
If iodine solution turns blue-black what substance is present?
Starch.
Why is iodine necassary in an experiment?
It turns blue-black if starch is present.
What color does iodine turn if a starch is present?
It turns a dark purple/black.
How do you add cornstarch?
You can test for starch in general using the chemical iodine test. If starch is present, a solution of iodine (I2) turns blue-black.
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 reagent is used to test for starch?
The reagent that is used to test for starch is a mixture of iodine and potassium iodide in water, or an Iodine - KI reagent. If the reagent turns blue-black in color, then starch is present.
What happens when you iodine to starch?
The starch turns indigo.
What is the reason paper turns black when iodine touches it?
When iodine touches starch it turns black. The paper may contain starch.
