How can i know if the reaction of an aldehyde is complete?
Q. I'm a reducing an aldehyde to produce a primary alcohol & I'm reducing a ketone to produce a secondary alcohol. What can indicate that the reaction is complete? What can I use to identify when the reaction is over? In other words what properties of an alcohol differ from that of an aldehyde or ketone? Can i use any indicators, pH? conductivity? some type of colour change?
Asked by Butterfly<33 - Tue Mar 23 17:37:43 2010 - - 1 Answers - 0 Comments
A. Easy Question .. To differentiate between them , The best way is to taste the product .. Just drink each of them in different time , When you get drunk then its the alcohol . after you know which one is the alcohol oxidize it , then you should obtain an aldehyde or ketone ( if its secondry alcohol ) , Oxidize it again and you should obtain a carboxylic acid if its a primary alcohol which oxidized to aldehyde , If no change then its a sec. alcohol which oxidized to ketone .
Answered by Mickey Mouse - Tue Mar 23 17:46:59 2010
Q. I'm a reducing an aldehyde to produce a primary alcohol & I'm reducing a ketone to produce a secondary alcohol. What can indicate that the reaction is complete? What can I use to identify when the reaction is over? In other words what properties of an alcohol differ from that of an aldehyde or ketone? Can i use any indicators, pH? conductivity? some type of colour change?
Asked by Butterfly<33 - Tue Mar 23 17:37:43 2010 - - 1 Answers - 0 Comments
A. Easy Question .. To differentiate between them , The best way is to taste the product .. Just drink each of them in different time , When you get drunk then its the alcohol . after you know which one is the alcohol oxidize it , then you should obtain an aldehyde or ketone ( if its secondry alcohol ) , Oxidize it again and you should obtain a carboxylic acid if its a primary alcohol which oxidized to aldehyde , If no change then its a sec. alcohol which oxidized to ketone .
Answered by Mickey Mouse - Tue Mar 23 17:46:59 2010
What is the electrophile in a reduction reaction of an aldehyde?
Q. Suppose I use sodium borohydride to reduc an aldehyde. The nucleophile is the hydride but what is the electrophile?
Asked by TheDoctor - Fri May 29 02:40:46 2009 - - 2 Answers - 0 Comments
A. The C=O bond will be thought as C(+)-O(-) when being reacted with borohydride. So the electrophile is the aldehyde carbon as the other friend suggested.
Answered by Barbaros - Fri May 29 02:59:06 2009
Q. Suppose I use sodium borohydride to reduc an aldehyde. The nucleophile is the hydride but what is the electrophile?
Asked by TheDoctor - Fri May 29 02:40:46 2009 - - 2 Answers - 0 Comments
A. The C=O bond will be thought as C(+)-O(-) when being reacted with borohydride. So the electrophile is the aldehyde carbon as the other friend suggested.
Answered by Barbaros - Fri May 29 02:59:06 2009
What is the full equation for a reaction between an alkanal (aldehyde) and potassium permanganate (an oxidiser?
Q. It doesn't really matter what the aldehyde is, I just want to see a full equation for one and potassium permanganate, because my chemistry textbook says that KMNO4 is used to oxidise an aldehyde and form an carboxylic acid, but it doesn't show the whole equation. I especially need to see what happens to the potassium permangate, and all the products. A short explination would be awesome. Thanks :)
Asked by Jazzy - Mon Nov 24 03:20:19 2008 - - 1 Answers - 0 Comments
A. The half-equation for MnO4- is given below (K+ is a spectator ion) MnO4- + 8H+ + 5e --> Mn2+ + 4H2O The aldehyde would be oxidized to a carboxylic acid, you're right. Thus a carboxylic acid would be one of your products. As seen from my equation above, you should also get Mn2+ (a faint pink solution) as well as H2O (water). However, in general, it is not necessary for students to give the equation for KMnO4 when discussing the oxidation of carbonyl compounds. It is sufficient to denote the oxidation by the general equation: aldehyde + [O] --> carboxylic acid where [O] represents oxygen (oxidation here being the basic addition of oxygen to the aldehyde) Hope I was of help! <3, phantasmal.spirit
Answered by phantasmal.spirit - Thu Nov 27 07:13:28 2008
Q. It doesn't really matter what the aldehyde is, I just want to see a full equation for one and potassium permanganate, because my chemistry textbook says that KMNO4 is used to oxidise an aldehyde and form an carboxylic acid, but it doesn't show the whole equation. I especially need to see what happens to the potassium permangate, and all the products. A short explination would be awesome. Thanks :)
Asked by Jazzy - Mon Nov 24 03:20:19 2008 - - 1 Answers - 0 Comments
A. The half-equation for MnO4- is given below (K+ is a spectator ion) MnO4- + 8H+ + 5e --> Mn2+ + 4H2O The aldehyde would be oxidized to a carboxylic acid, you're right. Thus a carboxylic acid would be one of your products. As seen from my equation above, you should also get Mn2+ (a faint pink solution) as well as H2O (water). However, in general, it is not necessary for students to give the equation for KMnO4 when discussing the oxidation of carbonyl compounds. It is sufficient to denote the oxidation by the general equation: aldehyde + [O] --> carboxylic acid where [O] represents oxygen (oxidation here being the basic addition of oxygen to the aldehyde) Hope I was of help! <3, phantasmal.spirit
Answered by phantasmal.spirit - Thu Nov 27 07:13:28 2008
Why is the oxidization of an aldehyde called an oxidization?
Q. According to the chemistry that I have leaned so far oxidization is when an atom or molecule looses an electron. However my Advanced level text book says that an oxidation reaction occurs when an oxygen atom joins the aldehyde . Can someone explain this?
Asked by I'm Sri Lankan - Wed Mar 11 07:28:36 2009 - - 3 Answers - 0 Comments
A. They are both correct. Losing an electron makes the compound more positive, just as gaining an electron makes in more negative (reduction). Adding oxygen to an aldehyde to produce an acid is also an oxidation.
Answered by Simonizer1218 - Wed Mar 11 07:49:26 2009
Q. According to the chemistry that I have leaned so far oxidization is when an atom or molecule looses an electron. However my Advanced level text book says that an oxidation reaction occurs when an oxygen atom joins the aldehyde . Can someone explain this?
Asked by I'm Sri Lankan - Wed Mar 11 07:28:36 2009 - - 3 Answers - 0 Comments
A. They are both correct. Losing an electron makes the compound more positive, just as gaining an electron makes in more negative (reduction). Adding oxygen to an aldehyde to produce an acid is also an oxidation.
Answered by Simonizer1218 - Wed Mar 11 07:49:26 2009
What classes of hydrocarbon is the aldehyde Cinnamaldehyde built on?
Q. What class(es) of hydrocarbon is the aldehyde Cinnamaldehyde built on
Asked by Educator1 - Tue Aug 18 21:59:00 2009 - - 2 Answers - 0 Comments
A. Cinnamaldehyde is [C6H5]-CH=CH-C(O)H...ethe ne with a phenyl group attached to one carbon and an aldehyde group to the other. So it wd be classed as an aromatic alkene aldehyde.
Answered by L. A. L. - Tue Aug 18 22:20:19 2009
Q. What class(es) of hydrocarbon is the aldehyde Cinnamaldehyde built on
Asked by Educator1 - Tue Aug 18 21:59:00 2009 - - 2 Answers - 0 Comments
A. Cinnamaldehyde is [C6H5]-CH=CH-C(O)H...ethe ne with a phenyl group attached to one carbon and an aldehyde group to the other. So it wd be classed as an aromatic alkene aldehyde.
Answered by L. A. L. - Tue Aug 18 22:20:19 2009
which carbonyl functional group is in the linear form of glucose-aldehyde or ketone?
Q. I believe its an aldehyde but not 100% sure. What other functional groups does glucose have?
Asked by Danielle Otis - Tue Apr 7 22:36:33 2009 - - 1 Answers - 0 Comments
A. You're correct. When a molecule of glucose is in a straight chain the carbonyl functional group is an aldehyde. Glucose has 6 carbons -Carbon #1 contains the aldehyde HC=O -Carbons 2-6 all contain alcohols (OH) That's all the functional groups that glucose has. Hope this helps - Good Luck!
Answered by Frederick Penderissues - Tue Apr 7 23:41:46 2009
Q. I believe its an aldehyde but not 100% sure. What other functional groups does glucose have?
Asked by Danielle Otis - Tue Apr 7 22:36:33 2009 - - 1 Answers - 0 Comments
A. You're correct. When a molecule of glucose is in a straight chain the carbonyl functional group is an aldehyde. Glucose has 6 carbons -Carbon #1 contains the aldehyde HC=O -Carbons 2-6 all contain alcohols (OH) That's all the functional groups that glucose has. Hope this helps - Good Luck!
Answered by Frederick Penderissues - Tue Apr 7 23:41:46 2009
How we prepare aldehyde from alcohol using Grignard reagent ?
Q. The number of carbon in aldehyde should be more (at least 2) than in alcohol. Cyclohexanol to C6H10 CH2 CHO ?
Asked by Nilesh - Sat Aug 2 07:13:22 2008 - - 1 Answers - 0 Comments
A. Boy, that's a tricky one... The first problem is that aldehydes are highly reactive towards Gringnard reagents. The second problem is Grignards don't react with alcohols. The second problem is the most straightforward. You can convert a hydroxyl to a chloro (or better yet bromo) with something like PCl5 or thionyl chloride in ether or THF and then add Mg to form the Grignard reagent. Now the second part of the reaction is the tricky part. If you want to add a one carbon aldehyde, you react your Grignard with formic acid. To minimize self-condensation, you would drip the freshly formed Grignard reagent into a huge excess of formic acid. This way, the Grignard reagent would quickly react with formic acid, and not have much chance… [cont.]
Answered by wilds_of_virginia - Sat Aug 2 09:29:00 2008
Q. The number of carbon in aldehyde should be more (at least 2) than in alcohol. Cyclohexanol to C6H10 CH2 CHO ?
Asked by Nilesh - Sat Aug 2 07:13:22 2008 - - 1 Answers - 0 Comments
A. Boy, that's a tricky one... The first problem is that aldehydes are highly reactive towards Gringnard reagents. The second problem is Grignards don't react with alcohols. The second problem is the most straightforward. You can convert a hydroxyl to a chloro (or better yet bromo) with something like PCl5 or thionyl chloride in ether or THF and then add Mg to form the Grignard reagent. Now the second part of the reaction is the tricky part. If you want to add a one carbon aldehyde, you react your Grignard with formic acid. To minimize self-condensation, you would drip the freshly formed Grignard reagent into a huge excess of formic acid. This way, the Grignard reagent would quickly react with formic acid, and not have much chance… [cont.]
Answered by wilds_of_virginia - Sat Aug 2 09:29:00 2008
How do you test for an aldehyde and carboxylic acids?
Q. If you had a pure sample of each, what two tests could be done to find out what is what. For each test give the outcome for the substances. I'm not sure but aldehydes neutral like alcohols? if so i could do an indicator test, right? i can't work it out at all and i've looked through the chemistry book and still can't find anything.
Asked by YuenYee - Fri Feb 20 15:48:05 2009 - - 3 Answers - 0 Comments
A. Tollens reagent is used to identify aldehydes - and you will get a silver mirror Sodium bicarbonate (NaHCO3) - gives effervescence with carboxylic acids,
Answered by Asmed - Fri Feb 20 15:59:58 2009
Q. If you had a pure sample of each, what two tests could be done to find out what is what. For each test give the outcome for the substances. I'm not sure but aldehydes neutral like alcohols? if so i could do an indicator test, right? i can't work it out at all and i've looked through the chemistry book and still can't find anything.
Asked by YuenYee - Fri Feb 20 15:48:05 2009 - - 3 Answers - 0 Comments
A. Tollens reagent is used to identify aldehydes - and you will get a silver mirror Sodium bicarbonate (NaHCO3) - gives effervescence with carboxylic acids,
Answered by Asmed - Fri Feb 20 15:59:58 2009
How do you name an Aldehyde attached to the 3 position on a Phenol group?
Q. the answer is 3-hydroxybenzaldehyde. best answer to whoever answers first.
Asked by physics help - Mon Nov 16 14:43:09 2009 - - 2 Answers - 1 Comments
A. is this the molecule you are asking about *** I guess I don't understand the issue. the aldehyde takes precedence. the OH is now called "hydroxy".. 3 hydroxybenzaldehyde..
Answered by m w - Mon Nov 16 14:56:45 2009
Q. the answer is 3-hydroxybenzaldehyde. best answer to whoever answers first.
Asked by physics help - Mon Nov 16 14:43:09 2009 - - 2 Answers - 1 Comments
A. is this the molecule you are asking about *** I guess I don't understand the issue. the aldehyde takes precedence. the OH is now called "hydroxy".. 3 hydroxybenzaldehyde..
Answered by m w - Mon Nov 16 14:56:45 2009
How do i tell the difference between a ketone and an aldehyde using only simple properties?
Q. How do you distinguish between an aledehyde and a ketone with only the melting and boiling points plus the fact it's soluble in carbon tetrachloride
Asked by Cookiemonster - Tue May 25 02:46:25 2010 - - 1 Answers - 0 Comments
A. Aldehyde would be having a higher boiling point due to more possibilities of hydrogen bonding since there is H as well as O. i dont know about the solubility in carbon tetra chloride but maybe it might be a hint towards reimer tiemann rxn...
Answered by Mygreatemail - Tue May 25 02:52:46 2010
Q. How do you distinguish between an aledehyde and a ketone with only the melting and boiling points plus the fact it's soluble in carbon tetrachloride
Asked by Cookiemonster - Tue May 25 02:46:25 2010 - - 1 Answers - 0 Comments
A. Aldehyde would be having a higher boiling point due to more possibilities of hydrogen bonding since there is H as well as O. i dont know about the solubility in carbon tetra chloride but maybe it might be a hint towards reimer tiemann rxn...
Answered by Mygreatemail - Tue May 25 02:52:46 2010
Can you say aldehyde is also a ketone? thanks for answering?
Q. I was wondering since ketone is a carbon double bonded to an oxygen and 2 R-groups... When one of the R-group appear to be hydrogen, the whole thing becomes aldehyde...so can you say aldehyde is also a ketone?
Asked by edbiology - Wed Sep 5 23:32:52 2007 - - 4 Answers - 0 Comments
A. thats right a ketone is a carbon double bonded to O and then 2 r groups, and aldehyde has R group, and an H. This does not make aldehyde a ketone however, because R group must be carbons. Both are carbonyls, c double bonded to O, but both are not ketones.
Answered by Alan V - Wed Sep 5 23:41:59 2007
Q. I was wondering since ketone is a carbon double bonded to an oxygen and 2 R-groups... When one of the R-group appear to be hydrogen, the whole thing becomes aldehyde...so can you say aldehyde is also a ketone?
Asked by edbiology - Wed Sep 5 23:32:52 2007 - - 4 Answers - 0 Comments
A. thats right a ketone is a carbon double bonded to O and then 2 r groups, and aldehyde has R group, and an H. This does not make aldehyde a ketone however, because R group must be carbons. Both are carbonyls, c double bonded to O, but both are not ketones.
Answered by Alan V - Wed Sep 5 23:41:59 2007
What is the product of an alcohol and an aldehyde?
Q. Is it a carboxilic acid or an ester?
Asked by Tiffany - Sat Jun 5 21:18:05 2010 - - 2 Answers - 0 Comments
A. The product of these two compounds is actually neither a carboxylic acid nor an ester. One equivalent of alcohol plus an aldehyde yields what's called a hemiacetal. Two equivalents of alcohol plus an aldehyde gives an acetal. I hope this helped!
Answered by Paul - Sat Jun 5 21:25:13 2010
Q. Is it a carboxilic acid or an ester?
Asked by Tiffany - Sat Jun 5 21:18:05 2010 - - 2 Answers - 0 Comments
A. The product of these two compounds is actually neither a carboxylic acid nor an ester. One equivalent of alcohol plus an aldehyde yields what's called a hemiacetal. Two equivalents of alcohol plus an aldehyde gives an acetal. I hope this helped!
Answered by Paul - Sat Jun 5 21:25:13 2010
Aldehydes are easily oxidized into carboxylic acids. How can Solubility tests help me determine if an aldehyde
Q. has converted into a carboxylic acid?
Asked by Piccolo B - Wed Nov 28 01:06:06 2007 - - 1 Answers - 0 Comments
A. Assuming the starting aldehyde is insoluble in water, the carboxylic acid will easily dissolve in an aqueous solution of sodium bicarbonate. The aldehyde will not.
Answered by Glenguin - Thu Nov 29 22:32:51 2007
Q. has converted into a carboxylic acid?
Asked by Piccolo B - Wed Nov 28 01:06:06 2007 - - 1 Answers - 0 Comments
A. Assuming the starting aldehyde is insoluble in water, the carboxylic acid will easily dissolve in an aqueous solution of sodium bicarbonate. The aldehyde will not.
Answered by Glenguin - Thu Nov 29 22:32:51 2007
What aldehyde forms chains from which the sugar ribose is easily formed?
Q. What aldehyde forms chains from which the sugar ribose is easily formed?
Asked by ieatreese88 - Sun Jun 28 13:47:50 2009 - - 2 Answers - 0 Comments
Q. What aldehyde forms chains from which the sugar ribose is easily formed?
Asked by ieatreese88 - Sun Jun 28 13:47:50 2009 - - 2 Answers - 0 Comments
What classification of compound undergoes oxidation to give an aldehyde?
Q. What classification of compound undergoes oxidation to give an aldehyde?
Asked by Breathlesskiss57 - Tue Jul 21 07:21:57 2009 - - 4 Answers - 0 Comments
Q. What classification of compound undergoes oxidation to give an aldehyde?
Asked by Breathlesskiss57 - Tue Jul 21 07:21:57 2009 - - 4 Answers - 0 Comments
Which bond functional group will make a benzene ring more polar: aldehyde or hydroxyl?
Q. The benzene ring with the aldehyde group has a total of 7 carbons, 7 hydrogens, and one oxygen. The benzene ring with the hydroxyl group has a total of 6 carbons, one oxygen and 6 hydrogens.
Asked by j0nthelin - Thu Oct 11 17:10:09 2007 - - 2 Answers - 0 Comments
A. Oxygen is much more electronegative of the hydroxyl group than the Carbon of the aldehyde. Since the benzene ring is a ring of electrons the Oxygen will cause unstability and therefore a larger dipole moment and charge difference. The hydroxyl group will cause more polarity.
Answered by The Ultimate Answer Guaranteed - Thu Oct 11 17:19:51 2007
Q. The benzene ring with the aldehyde group has a total of 7 carbons, 7 hydrogens, and one oxygen. The benzene ring with the hydroxyl group has a total of 6 carbons, one oxygen and 6 hydrogens.
Asked by j0nthelin - Thu Oct 11 17:10:09 2007 - - 2 Answers - 0 Comments
A. Oxygen is much more electronegative of the hydroxyl group than the Carbon of the aldehyde. Since the benzene ring is a ring of electrons the Oxygen will cause unstability and therefore a larger dipole moment and charge difference. The hydroxyl group will cause more polarity.
Answered by The Ultimate Answer Guaranteed - Thu Oct 11 17:19:51 2007
What are the natural compounds that contain both keto and aldehyde group?
Q. What are the natural compounds that contain both keto and aldehyde group?
Asked by subhankarr - Wed Jul 14 05:34:02 2010 - - 1 Answers - 0 Comments
A. -Ketones refer to compounds whose carbonyl group (=CO) is within the carbon skeleton. An example of a ketone is acetone. -Aldehydes refer to compounds whose carbonyl group is at the end of the carbon skeleton. An example of an aldehyde is propanal. You can refer to these links for more info: I hope this helps
Answered by I could care less - Wed Jul 14 07:46:45 2010
Q. What are the natural compounds that contain both keto and aldehyde group?
Asked by subhankarr - Wed Jul 14 05:34:02 2010 - - 1 Answers - 0 Comments
A. -Ketones refer to compounds whose carbonyl group (=CO) is within the carbon skeleton. An example of a ketone is acetone. -Aldehydes refer to compounds whose carbonyl group is at the end of the carbon skeleton. An example of an aldehyde is propanal. You can refer to these links for more info: I hope this helps
Answered by I could care less - Wed Jul 14 07:46:45 2010
What is a benzaldehyde called with another aldehyde attached to the ring (para)?
Q. well we have to draw the products of the following reaction and the structure literally looks like the normal benzaldehyde with another h double bond o attached on the opposite side (para) I need to know what the products of that would be reacted w/ oxone,heat, water.
Asked by B - Sun Apr 5 21:07:40 2009 - - 1 Answers - 0 Comments
Q. well we have to draw the products of the following reaction and the structure literally looks like the normal benzaldehyde with another h double bond o attached on the opposite side (para) I need to know what the products of that would be reacted w/ oxone,heat, water.
Asked by B - Sun Apr 5 21:07:40 2009 - - 1 Answers - 0 Comments
why are the alpha H of an aldehyde more acidic than the alpha H of a ketone?
Q. any help would be appreciate it.
Asked by M M - Wed Jun 4 17:26:17 2008 - - 3 Answers - 0 Comments
A. It is related to the stability of the carbanion produced. In simple terms, it is easier to produce a more stable carbanion. Both have resonance stabilization using the C=O. In the aldehyde, there is only a H attached to the C=O. In the ketone, there will be some other R group, for example maybe a CH3. The CH3 has a certain amount of electron release which would destabilize the carbanion slightly. The lone H does not do this.
Answered by Richard - Wed Jun 4 17:36:31 2008
Q. any help would be appreciate it.
Asked by M M - Wed Jun 4 17:26:17 2008 - - 3 Answers - 0 Comments
A. It is related to the stability of the carbanion produced. In simple terms, it is easier to produce a more stable carbanion. Both have resonance stabilization using the C=O. In the aldehyde, there is only a H attached to the C=O. In the ketone, there will be some other R group, for example maybe a CH3. The CH3 has a certain amount of electron release which would destabilize the carbanion slightly. The lone H does not do this.
Answered by Richard - Wed Jun 4 17:36:31 2008
What are the main differences between aldehyde and ketone?
Q. What are the main differences between aldehyde and ketone?
Asked by adamaltmann - Wed Aug 13 04:39:36 2008 - - 2 Answers - 0 Comments
A. Both contain the -C=O group, but in an aldehyde the carbonyl group is on the end of the carbon chain. This allows aldehydes to be easily oxidised to carboxylic acids. Ketones can only be oxidised further if a C-C bond is broken: a fairly energetic process. This difference in ease of oxidation is by far the most important difference between the two functional groups .. and provides the basis of the Tollens Test (silver mirror) to tell them apart.
Answered by CB - Wed Aug 13 04:46:37 2008
Q. What are the main differences between aldehyde and ketone?
Asked by adamaltmann - Wed Aug 13 04:39:36 2008 - - 2 Answers - 0 Comments
A. Both contain the -C=O group, but in an aldehyde the carbonyl group is on the end of the carbon chain. This allows aldehydes to be easily oxidised to carboxylic acids. Ketones can only be oxidised further if a C-C bond is broken: a fairly energetic process. This difference in ease of oxidation is by far the most important difference between the two functional groups .. and provides the basis of the Tollens Test (silver mirror) to tell them apart.
Answered by CB - Wed Aug 13 04:46:37 2008
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