0
Why does potato turn muddy green when tested with Benedict solution?
Wiki User
∙ 11y ago
It turns that colour because it contains a small amount of starch.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Why cant table sugar be the positive control in test using Benedict's solution?
Table sugar, or sucrose, doesn't have an aldehyde group. Benedict's solution is used to determine if a reducing sugar is present. If it is a reducing sugar, the mixture will turn green/orange/red. The Benedict's solution contains copper (II) ions, which are reduced to a brick red precipitate of copper (I) oxide when the solution is heated. The Aldehyde (-CHO) group in a reducing sugar is the source of electrons that reduces copper (II) to copper (I). Since sucrose doesn't have an aldehyde group, it will not test positive for reducing sugars; it will not reduce the copper II in Benedict's to copper I and change the color of the solution.Fructose does not have an aldehyde group, yet it is reducing, because it gets rearranged to the reducing glucose in basic solution.All monosaccharides and some disaccharides are reducing sugars. Sucrose is one of the disaccharides that is not a reducing sugar.
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.
An unknown sample is tested with both biuret reagent and benedicts reagent both test result in a blue color what has been learned and why are these called negative results?
That the unknown sample is not a monosaccharide and is does not contain peptide bonds (is not a protein). This is because they both produced negative results because Biuret tests positive in solutions that contain peptide bonds and will turn a violet color. Benedict reagent reacts to monosaccharides and will turn green-reddish orange when a monosaccharide is present. Neither of these things happened so the results are negative.
What part of lettuce do you eat?
It's the root.no it isn't. ince again a common mistake because the potato is underground but it isn't a root its a bulbous stem. now sweet potato on the other hand is a real root
What would cause the blue btb solution containing elodea to turn green?
carbon dioxide from the plant and the more yellow the solution is the more Carbon Dioxide there is. The greener or bluer it is, the less carbon dioxide.
What color is Benedict solution after boiled with a chewed cracker?
an orange/red
What is the reagent used for testing for reducing sugars?
A reducing sugar refers to a sugar that either has an aldehyde group or is capable of isomerism. Some common oxidizing agents that are used to test for the presence of a reducing sugar are Benedict's solution, Fehling's solution and Tollen's reagent.
Why does a cooked rice with Benedict's solution change its color when it is heated?
Benedict Solution is use to check the presence of Saccharides in food by changing the specimen's color like cooked rice when it puts a few drops of Benedict solution it change its color as yellow green. It means there is a presence of sugar in rice. About the Saliva thing, (Benedict Solution+Saliva+Cooked Rice) Saliva breaks the sugar into fragments so it helps the Benedict Solution to find the presence of sugar in rice, So it makes more yellow green than without Saliva one
How do you prove there is glucose in a sample?
You can prove there is glucose in a sample by using Benedict's Solution. Heat up the sample, and add the Benedict's Solution. Assuming the solution is clear, if glucose is present it will change colour to red, or yellow, or green. If not, it will stay clear.
What color does saliva turn into with the Benedict's solution?
Benedict's solution changes colors (blue to green to yellow to orange to red) in the presence of "reducing" sugars, which are not normally present in saliva. An interesting experiment, however, is testing table sugar with Benedict's solution. Table sugar is a glucose sugar joined to a fructose sugar, so they cannot react with the Benedict's solution and no color change occurs. Put table sugar in your mouth for a few moments, and then test the saliva. Now the Benedict's solution will react! (The reason: saliva has an enzyme, amylase, which breaks the glucose and fructose apart so that they can react to the Benedict's.)
Why is the solution of universal indicator green?
It means that the substance tested is neutral.
Why Benedict's solution turns green in urine test?
It means that the sugar level in your urine is .5% higher than the normal sugar level . (=
How will you test for reducing sugars?
Add the substance to be tested to Benedict's solution. Heat to 95 degrees Celcius. If a precipate forms, reducing sugars are president. A significant amount of it will make the precipate orange-red. A little will make the solution green, meaning only a small amount of sugar.
Who ate the green potato chip?
Cadjea ate the green potato chips
What colour will Benedict's solution turn into if sugar is added?
The reacting sucrose solution color will depend on the concentration of the sucrose in solution. The higher the concentration, the darker the color: green is the least concentrated, to yellow/orange, red, and brown with the highest concentration.
Is the Benedict's solution test qualitative?
Benedicts solution changes through a range of colours (blue, green, orange, red) according to how much reducing sugar is present in the sample. This can be used to give a rough answer to the question "How much sugar is in the sample?", but is not accurate enough (because of the blending between one colour and the next), to be called a quantitative test.
What has the author Elinor Benedict written?
Elinor Benedict has written: 'The Green Heart' 'Chinavision'
