Errors on DAT Achiever?

[Tracy47]

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any noticed how DAT achievers have errors? Was doing my practice last night, and DAT Achiever claims that Carboxyllic acid react with ammonia to yield amide. This is FALSE, and it could mess you up on the real exam.

In case you're wondering, it'll form RCOO-NH4+

 

[zacky2005]

any noticed how DAT achievers have errors? Was doing my practice last night, and DAT Achiever claims that Carboxyllic acid react with ammonia to yield amide. This is FALSE, and it could mess you up on the real exam.

In case you're wondering, it'll form RCOO-NH4+

I don't recall seeing such error in my recent/intensive use of such program. Which specific question you're referring to?

 

[miravyn]

any noticed how DAT achievers have errors? Was doing my practice last night, and DAT Achiever claims that Carboxyllic acid react with ammonia to yield amide. This is FALSE, and it could mess you up on the real exam.

In case you're wondering, it'll form RCOO-NH4+

You're right. Because it is an acid/base reaction. I saw a question like that on a Kaplan test.

 

[mitshi]

any noticed how DAT achievers have errors? Was doing my practice last night, and DAT Achiever claims that Carboxyllic acid react with ammonia to yield amide. This is FALSE, and it could mess you up on the real exam.

In case you're wondering, it'll form RCOO-NH4+

I doubt the author of DAT Achiever may be that careless in making this blatant mistake, Tracy. You must have misread something and got yourself confused along the way... Questions in DAT Achiever's OChem on the formation of amides (that concerns you in this context) usually entail the following:

Acylation of ammonia or amine, or

Carboxylic Acid + Amine --> Amide + Water

Check it out yourself and refer to your textbook if need be... I hope you'll do well on your real SNS though. 🙂

 

[Tracy47]

Hi Mitshi,

I disagree. Carboxylic Acid + Amine --> does not produce amide.

I checked with my books as well. I just want to clarify, as I don't want anyone messing up on your real exam.

 

[mitshi]

Hi Mitshi,

I disagree. Carboxylic Acid + Amine --> does not produce amide.

I checked with my books as well. I just want to clarify, as I don't want anyone messing up on your real exam.

Right, Tracy, and strictly speaking, it’s supposed to be a 2-step process with the second one proceeded viably upon heating:

RCOOH + R’2NH --> RCOO-R’2NH2+ --> RCONR’2 + H2O

However, it’s not chemically wrong to combine the above in a single operation for general discussion/comparison purpose. Does that help clarify your concern, or something else is still missing here?

 

[Tracy47]

Hi Mitshy, I'm not following you. You are right about having 2 steps. To make an amide from a carboxyllic acid, you have to first convert it to an acid halide, and then add the amine to convert it into an amide.

Sorry, I couldn't follow your second step. 😛