Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1] 2 3 ... 10
 1 
 on: Today at 12:43:29 AM 
Started by Optimist - Last post by Optimist
I planning to perform formylation of amine using formic acid & acetic anhydride (aectic formic anhydride, AFA). I have  formic acid >95% purity with 2.5% water as stabilizer in the Lab. Is it possible to synthesized AFA using 95% formic acid and acetic anhydride. I have read somewhere but couldn't able to remember the reference that AFA is sensitive to moisture and decompose when exposed to moisture. Formylation of amine can be done using 95% formic acid & acetic anhydride ? if not ? How to purify formic acid by conventional procedure.

I have seen lots of method for removing water from formic acid. Like distillation etc.. but i don't have fractional distillation apparatus under reduce pressure.

Can Phtalic anhydride, anhydrous CuSO4, boric anhydride or other suitable drying reagents would can be utilized to fully remove the water content from the formic acid?

Any insight will be highly appreciated.




 2 
 on: Yesterday at 09:27:29 PM 
Started by saratan - Last post by Borek
I would love to help, but do you really want me to break my neck?

 3 
 on: Yesterday at 09:25:47 PM 
Started by Borek - Last post by Borek
This topic has been moved to Chemical Education.

http://www.chemicalforums.com/index.php?topic=92452.0

 4 
 on: Yesterday at 09:05:28 PM 
Started by chrisp - Last post by chrisp
Hi

My daughter gets her a level results today and she's applied for a BEng course that we thought was IChemE accredited, but found out yesterday that it's not.

How important is the IChemE accreditation to the chemical engineering industry in the U.K. , and how will her future prospects be affected if she ends up with a degree that is not IChemE accredited? Any timely advice you can give will be appreciated as she will need to make some decisions today. Many thanks


 5 
 on: Yesterday at 05:42:33 PM 
Started by saratan - Last post by saratan
OP(=O)([O-])[O-]

So I was asked to find the pH of .1 molar of this amphiprotic acid, and this is what I came up with:



my answer to the question ended up being pH = 10.1 however the correct answer is 9.78, I am trying not to use a well known equation because I am trying to understand this topic on a deeper level. What could I be doing wrong here? Did I choose the wrong equation to work with? or am I not accounting for another source of [H+] or [OH-]?

 6 
 on: Yesterday at 07:39:31 AM 
Started by Vargulf - Last post by Vargulf
Thank you for your help. So hydrogen sulfide and aluminum chloride result from this reaction, right? The only problem would be that there are not enough aluminum atoms in comparison to the sulfur atoms. Or are not all sulfur atoms reacting, because they are ionized?

 7 
 on: Yesterday at 06:47:05 AM 
Started by kriggy - Last post by rolnor
OK, I should have checked the reference.

 8 
 on: Yesterday at 05:40:24 AM 
Started by AMZ101 - Last post by Arkcon
We don't need two: http://www.chemicalforums.com/index.php?topic=92448.0

 9 
 on: Yesterday at 05:18:02 AM 
Started by AMZ101 - Last post by AMZ101
Hey guys just wondering if anyone could help with constructing an experiment that helps me to compare the rates of hydrolysis of pure amylose and amylopectin and also goods, substances, materials which contain varying forms of these starches. I believe the iodine solution test would help to detect levels of amylose on these starches but I'm having trouble with detecting the levels of amylopectin

 10 
 on: Yesterday at 05:15:09 AM 
Started by AMZ101 - Last post by AMZ101
Hey guys just wondering if anyone could help with constructing an experiment that helps me to compare the rates of hydrolysis of pure amylose and amylopectin and also goods, substances, materials which contain varying forms of these starches. I believe the iodine solution test would help to detect levels of amylose on these starches but I'm having trouble with detecting the levels of amylopectin.

Pages: [1] 2 3 ... 10

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.14 seconds with 18 queries.