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What else can I help you with?
What chemical indicator do you use for starch?
Starch is not the indicator. Iodine is the indicator of starch.
What is the equation for iodine mixed with glucose?
I2(l) + H2O(l) -> OI-(aq) + 2H+(aq) + I-(aq)
What is an indicator for starch and the reaction is?
Iodine is an indicator for starch. The reaction between iodine and starch causes a color change from brown/orange to blue/black.
Which reacts to iodine glucose or starch?
Starch turns blue when Iodine is introduced. Added: Though it's not quite a chemical reaction, Iodine will give starch a bluish purple color but it stays chemically UNchanged. Iodine stays reddish brown with glucose and many other oligosaccharides (up till about 10 to 15 monomeric glucose units)
Why is the indicator not added to the titration flask at the begging of the iodomettic titration?
Adding the indicator at the beginning of the iodometric titration can react with the iodine present, which can lead to errors in the titration results. By adding the indicator after most of the iodine has reacted, it ensures that the endpoint is more accurate and reliable.
What color is glucose when lugol's iodine is added?
I did this lab experiment in my biology class. When Lugol's indicator is added to glucose, it turns to a dark green colour for starch it turns black and for surcose it turns yellow.
What chemical indicator do you use for starch?
Starch is not the indicator. Iodine is the indicator of starch.
What is the equation for iodine mixed with glucose?
I2(l) + H2O(l) -> OI-(aq) + 2H+(aq) + I-(aq)
What chemical detects glucose?
A chemical called glucose oxidase is commonly used to detect glucose. This enzyme reacts with glucose in the presence of oxygen, producing hydrogen peroxide as a byproduct. The level of hydrogen peroxide produced is then typically measured as an indicator of the glucose concentration in a sample.
What indicator tests for starch?
iodine.
What is iodine used as an indicator for?
Iodine is used as an indicator for starch. When a substance has iodine added to it, then it will turn into a dark blue color. This is a sign that the substance indeed has starch in it.
What is the role of the indicator?
indicator help us find out find out which molecules diffused and which didn't.... for example: starch indicator indicate starch......and.......glucose indicator indicate glucose.
How do you make a vitamin c indicator?
Iodine makes a good indicator. The iodine will blend into the surrounding color. Once their is no more vitamin c then the iodine will start to chemically combine with any starches
How does Lugol's solution work as an indicator?
An indicator is a substance that changes colour in the presence of another substance. Let say inside the beaker are substances of both glucose and starch. The glucose and starch are of same colour. By injecting the lugol's solution into the beaker, the lugol's solution changes colour in the area of where starch is, while no colour changes in the presence of glucose. Thus, by using the Lugol's solution which only acts as indicator for starch and not glucose, we could tell part which area floats around with glucose and starch substances. Lugol's solution works as an indicator because it will stain starches due to iodine's interaction with the coil structure of the polysaccharide.
What is an indicator for starch and the reaction is?
Iodine is an indicator for starch. The reaction between iodine and starch causes a color change from brown/orange to blue/black.
What color does the indicator turn when starch is present?
Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. Iodine is used to indicate whether starch is present in a solution. If starch IS present, the indicator will turn dark blue/black. FOR WHAT PURPOSE WE USE STARCH-IODINE INDICATOR PAPER
Is glucose expected to have a positive iodine test?
Yes, glucose is expected to give a positive iodine test. Iodine reacts with glucose to form a blue-black color, indicating the presence of reducing sugars in the sample.
