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What is the indicator and color change for a positive test for glucose?
Wiki User
∙ 8y ago
Benedict solution is the chemical indicator for simple sugars.
Wiki User
∙ 12y ago
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How do clinistix work?
The sticks contain enzymes (glucose oxidase and peroxidase) which react in the presense of glucose. The glucose oxidase changes glucose into gluconic acid and hydrogen peroxide and the peroxidase reacts with that hydrogen peroxide to change a pigment in the stick from neutral color to positive color.
Which indicator would most likely yield a positive test by way of a color change in the water-cookie solution?
Benedicts solution
How does the type of indicator affect the pH?
Each indicator has a specific change of color when the pH is changed.
What is acid base indicator?
An acid base indicator is a chemical substance that has the ability to change color depending on the pH.
What color does universal indicator turn in deionized water?
since water is pretty neutral, the water does not change color but the universal indicator does. The universal indicator changes color as per the quantity of deionized water... But it changes to straw color or pale yellow in 50mL of deionized water.
Is iodine an indicator of glucose?
No. Iodine is an indicator of starch which results in a bluish-black color when mixed.
What will happen if you pour starch indicator solution into the cell and filled the beaker with starch and glucose solution?
The starch indicator solution will diffuse out of the bag (cell) into the beaker, changing the color of the starch solution to a blue, purple, or black color (assuming that it's iodine). The color of the indicator solution inside the bag will not change, because only the glucose can diffuse into the bag, but the starch cannot diffuse into the bag.
What color does the blue colored glucose indicator turn when glucose is present?
The blue colored glucose indicator is something called "Benedict". Glucose has no color to start off with. Once you add benedict to it inside a testube, you have to heat it up in a waterbath. The color you should get it a green, yellow, orange (you should get this color mostly), orange-red, or brick red depending on how much glucose is in the solution.
Is a change in mass an indicator of chemical reaction?
No, it is NOT an indicator of a chemical reaction. Change in color IS an indicator of chemical change, though.
How do clinistix work?
The sticks contain enzymes (glucose oxidase and peroxidase) which react in the presense of glucose. The glucose oxidase changes glucose into gluconic acid and hydrogen peroxide and the peroxidase reacts with that hydrogen peroxide to change a pigment in the stick from neutral color to positive color.
Which indicator would most likely yield a positive test by way of a color change in the water-cookie solution?
Benedicts solution
What color is positive test result for glucose?
the color of a positive test results is bright green
What is the color of marigold flower indicator when acidic substance is added to it?
No color change is there...
What can be used as an indicator for a physical change and a chemical change?
Change in Color.
What is the function of an indicator in titration?
Change color
How does the type of indicator affect the pH?
Each indicator has a specific change of color when the pH is changed.
What test would you need to perform to prove that it is the combination of glucose and the glucose indicator solution that changes color when heated and not just the glucose or the glucose indicator?
That's actually not that difficult. If one wishes to answer this question in depth, feel free, but all one must do is test them separately. Just put glucose and your indicator (most-likley benedict's solution) in separate beakers, and then heat them both. Nothing will happen to either of them.
