Organic Chem - Identifying Functional Groups

  • Thread starter whiteman
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  • #1
whiteman
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Homework Statement


Hi all,
i have to identify 5 samples (1,2,3 were solids, 4,5 were liquids) by classifying them as
1) Aliphatic or aromatic and
2) Carboxylic acid, amine (primary, secondary, tertiary) or ammonium carboxylate

We did a burn test on the solids, tested solubility in water (and test solution for pH), tested solubilty in HCl, and treatment with 10% NaOH, in that order


Homework Equations


Results:
Burn Test: 1 - Clean flame, no smoke 2 - Yellow sparks, smoky-ish flame 3 - smoky flame
Solubilty in Water: 1 - Dissolved 2 - Dissolved 3 - Partially 4 - Partially in hot water 5 - Partially in hot water
pH: 1 - Acid 2 - Neutral (i think) 3 - Acid 4 - Basic 5 - Basic
Solubilty in HCl: 1 to 4 - Undissolved 5 - Dissolved
Addition of 10% NaOH: 1 to 3 - No smell but dissolved 4 and 5 both ahd a pungent smell


The Attempt at a Solution


1 is an aliphatic compound. 2,3 are aromatic.
Solution 1 is a simple carboxylic acid. Solution 2,3 are aromatic carboxylic acids.
Solution 4,5 are either amines or ammonium carboxylates. i can't figure out which.
The results are subject to college lab conditions and may be wrong (but hopefully not)
So can anyone clarify the functional groups?
Thanks
 

Answers and Replies

  • #2
chemisttree
Science Advisor
Homework Helper
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A clean flame means what type of compound?
Solubility in water means 'what' for and organic compound?
Solubility in HCl is seen for what type of organic compound?
How about solubility in NaOH?
If you smell something when you treat it with strong base, what could that be? Other than 'pungent', what did it smell like? Flowers? Skunk?
 

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