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Sucrose and honey are commonly used sweeteners. Suppose you had sweet-tasting waler solution that contained either honey Or sucrose. How would you chemically deter...

Question

Sucrose and honey are commonly used sweeteners. Suppose you had sweet-tasting waler solution that contained either honey Or sucrose. How would you chemically determine which sweetener was present?

Sucrose and honey are commonly used sweeteners. Suppose you had sweet-tasting waler solution that contained either honey Or sucrose. How would you chemically determine which sweetener was present?



Answers

Plan an experiment that will allow you to measure the concentration of a sugar solution. What do you need to have? What measurements must you make? How will the concentration of an unknown sugar solution be deduced?

So here we're looking at ass protein. Yeah, but basically we'll just draw it up like this. Three plus, followed by an A might group. Okay, followed by an astro group there and then uh, this site we have a pencil. So we have this sweetener here. Here is it's nice structure. Okay, so there are a couple of um product byproducts have some acid localized hydraulic. Asus simply be due to the multiple functionalities here. Okay, so here, if we start off with this site, well, basically get is we get the loss of this myth oxy here. Okay. And it's just struck green water will come up or the carbon Neil basically pick up approach on there. Then water will come to form a tetra hydro intermediate. This guy gets protein ated and departs. Okay, so that's just an overview of the Mc and reform the first buy a product here where the end? S true gets converted into a car box. Little acid like that. Peace for the final. Okay, so that is definitely not the end this car box went on this and then can also be hydrolyzed quite simply by picking up proton. Well, that's not too different. And the third kind of intermediate that actually fully drought is here, we're quite similar to the green. The carbon Neil oxygen will pick up uh her time to help us form the tetra federal intermediate. We're allowing the water to do some basically feel like a fool substitution nitrogen gets pro nated and we basically cleave that bond there on us than to form two compounds. So then I'll draw out the two compounds for the blue. Okay, so we had this backbone right here. But then here is we're reformed the clocks little gas ID. And then we had the other end left as an amine. Okay, then we have this byproduct as well. Hey. And as well I was hinting at in the red that it wasn't too different. This guy can also pick up a proton here. You can form just a couple different thanks from Asus hydraulic Asus. That's just something a little bit of the complexity that can occur when we start to add all these functionalities to make these real instructors. Then this is not very specific reaction to. Is there our host of byproducts, But just to go over the basic mechanism here, Step one is a carbon hill picks up a proton. Water comes in to do nuclear field a substitution and we lose believing group. Yeah. And that's how we do the acid hydrolyzed sis.

Who had a super time is hospitalized completely in the present off a quaintness solution off hydrochloric acid. Then the peptide ling case or, um, idling case and a stern like it gets cleaved and we get the corresponding acid alcohol. And, um, you I mean, no answered here for the step one thought when, as per time is hospitalized, idolized completely and, uh, the yeah presents off Chris. Yeah. Presents off. Yeah, a quest solution off hydrochloric. Uh huh. Has here then peptide ling case Or am I? And a sterling case cares cleaved and we get corresponding Acid and alcohol all met. I mean, a said so for the same thing as as part time in this esper time, Which is this as part time undergoes high delicious proceed to, um I know su chronic acid. Yeah, supposed to ominous technique acid, which is this toe. I mean a technique as here. Two amino, three fennel pro panic acid and two amino city Finnell pro panic Proper nick acid. Yes. Good on maintain methanol. So this is the process. And when Yeah,

So the citric acid in the lemon juice? Yeah. Goodbye With the CH 202. So alcohol linkage, The super cruise informant Esther investors. Okay? Are sweeter then sucrose usually. So they will make that product, which is, can be in this case, Yeah. Taste sweeter than it had been with just the suit cross.

In this question, we're going to analyze Honey, which contains about 17% of water. So we want to confirm that the batch of honey was not adulterated with water or water wasn't added to the honey. So we can use cola metric Karl Fischer deterioration in order to analyze the amount of water in the honey. And this type of penetration is based off of the constant reaction. So in this reaction it involves redox between the alcohol cell, fight salt and iodine. So first of all, we're going to take the sample of the honey. We're going to use a syringe and put it into the titillation cell. And we're going to get the math of the sample so that we are able to find the water content compared to the mass of the total sample. And there's going to be a volt meter. That is going to indicate the number of micrograms of water in the sample after titillation. So, because we have the original mass of the sample, we of course, can find the percentage of that mass which is going to be the water. And we'll have to see whether or not it is Greater than 17 if it is. That means that water has been added to the honey sample. So back to the Bunsen reaction, we can see that there is alcohol reacting with sulphur dioxide and also a base and this base is acting as a buffer to keep the ph stable. Then from this reaction we get the alcohol, sulphites salt. And this is the important part of the reaction because of the redox between the alcohol, sulphites salt and also the iodine. So the iodine access an oxidizing agent. So it's going to oxidize the alcohol. Fight salt into alka sulfate salt, you could say self fight turned into sulfate and then this produces reading on the volt meter, which corresponds to the amount of access iodine present. And you can see that the story geometry between water and iodine is 1 to 1. So based off of our reading on the volt meter, we can get the amount of the iodine president and from that we can calculate the amount of the water present using store chiana tree, so that is essentially how we're going to analyze the water content of the honey.


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