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Answer:- It requires energy for the Cu2+ ions in the Benedicts to be reduced to Cu+
Explanation:-
Benedicts reagent indicates a reducing sugar because it consists of copper (II) sulphate in an alkaline solution. Its distinctive blue colour turns brick red when it is added to a reducing agent because the Cu2+ ions will be reduced, resulting in copper (I) sulphate, which is brick red. This is where the term "reducing sugars" comes from. All sugars that reduce the benedicts have an available aldehyde or ketone group. It is this group that provides the electron needed to reduce the Benedict's. Because of ionisation energies, even when the reducing sugar is present energy is required to remove the electron from the valence shell. This is why heat is required. It does not, as the previous answer stated, have anything to do with enzymes. Enzymes are globular protein molecules whereas saccharides are ring structured carbohydrate molecules. Do not use any of that answer in any work you might do!
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What is the difference between object oriented testing and conventional testing?
Conventional testing is the traditional approach to testing mostly done when water fall life cycle is used for development, while object oriented testing is used when object oriented analysis and design is used for developing enterprise software. Conventional testing focuses more on decomposition and functional approaches as opposed to object oriented testing, which uses composition. The three levels of testing (system, integration, unit) used in conventional testing is not clearly defined when it comes to object oriented testing. The main reason for this is that OO development uses incremental approach, while traditional development follows a sequential approach. In terms of unit testing, object oriented testing looks at much smaller units compared to conventional testing
What is the value of testing and retesting ideas scientifically?
While controlled experiments can offer compelling evidence to support a hypothesis or theory, not all ideas are tested this way.
What is the difference between investigation and experiment?
Well basically a investigation is when someone is trying to find out about something or someone while a experiment is testing a hypothesis and trying to get a conclusion
What is the reagent used to test carbohydrates?
Two of the most common reagents used to test for the presence of sugar are Clomydihol and Marsupialinate. Both were found by pure accident by famous Dutch scientist Jelii Clubenin in the late 1800's while he was working on finding a cure for the common flu.
What is the variable that a scientist observes to change while conducting an experiment?
Depends on the experimnet, if you testing a reaction of metals with carbonates for example the variables might be; the size of the metal/carbonate, the amount of metal/carbonate, the from of metal e.g. solid or liquid
What is the difference between Benedict's Reagent and Biuret Reagent?
Benedicts reagent is used to check reducing sugars , it need hat to work and gives red color when positive ,. While biuret reagent is for proteins .there is no need to use heat and gives purple , violet color when positive ..
What is LR or AR grade chemicals?
The laboratory reagent grade are specified according to their purity. The common commercial grades of reagents are as follows.. AR- analytical reagent grade OR-organic reagent IP - pharmaceutical reagent grade LR- laboratory grade CP- Chemically pure
What is the difference between fehling's solution and tollens reagent?
Fehling's solution is used to test for the presence of reducing sugars, while Tollens reagent is used to test for the presence of aldehydes. Fehling's solution contains cupric ions, while Tollens reagent contains silver ions. When a reducing sugar reacts with Fehling's solution, a brick-red precipitate forms, while with Tollens reagent, silver ions are reduced to form a silver mirror on the test tube.
What is tollen's reagent and baeyer's reagent?
Tollen's reagent is a test used to detect the presence of aldehydes, as it produces a silver mirror when it reacts with aldehydes, but not with ketones or other compounds. Baeyer's reagent is a solution of potassium permanganate (KMnO4) used to oxidize and distinguish between primary and secondary alcohols. Primary alcohols are oxidized by Baeyer's reagent to form carboxylic acids, while secondary alcohols are oxidized to form ketones.
How can you prepare borsches reagent in the lab?
To prepare Borsches reagent in the lab, mix equal volumes of concentrated sulfuric acid and glacial acetic acid in a fume hood. Then, slowly add 9 parts of water to the mixture while stirring constantly. Allow the reagent to cool before use.
What is hinsberg reagent?
Hinsberg's reagent is benzenesulphonyl chloride. Prepared by chlorosuk
what is the outcome of tollens reagent reacting with methanal, ethanol and propanone?
The outcome of the Tollens reagent reacting with methanal (formaldehyde), ethanol (ethyl alcohol), and propanone (acetone) is the formation of metallic silver (Ag) in the case of methanal, while ethanol and propanone do not show a significant reaction with Tollens reagent. Tollens reagent is used as a chemical test to distinguish between aldehydes and ketones, where aldehydes react to produce a silver mirror, while ketones do not react.
Did cousteaus son die testing the aqualung?
Yes, Philippe Cousteau died in a plane crash in 1979 while testing a new seaplane design, not while testing the Aqualung apparatus.
Is a reagent and counterstain the same?
No, a reagent is a substance or compound used to cause a chemical reaction, while a counterstain is a dye or pigment used to provide contrast in microscopy by staining structures that are not being targeted by the primary stain.
How did Benedicts solution get its name?
it was named after it inventor the housewife, k.f benedict. she invented it while expshpereimenting in her lab with a few smimple ingedients for a normal house
What is the observation if to differentiate 2-butanone and 2-methylbutanal using Tollen's reagent and KMnO4?
2-butanone will give a positive test with Tollen's reagent, forming a silver mirror, while 2-methylbutanal will not react with Tollen's reagent. 2-methylbutanal will oxidize with KMnO4, turning the purple solution into a brown precipitate of manganese dioxide, while 2-butanone will not react with KMnO4.
What are the differences between group testing and individual testing?
Group testing is cheaper in comparision to individual testing and can be distributed to a large amount of people, while individual testing tends to be more indepth and. Individual testing is only given to one person at a time, while group testing can be given to a group of people at the same time.
