Chemistry lab

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leaf
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#1
Report Thread starter 18 years ago
#1
can anyone tell me what's the molecular mass of ethanedioic acid crystal?
i don't know the H2O is consider or not.
i.e. HOOC-COOH*2H2O or just HOOC-COOH?
Thanks.
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king of swords
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#2
Report 18 years ago
#2
(Original post by leaf)
can anyone tell me what's the molecular mass of ethanedioic acid crystal?
i don't know the H2O is consider or not.
i.e. HOOC-COOH*2H2O or just HOOC-COOH?
Thanks.
The crystal includes 2H2O, so the Mr of the crystal will include that too.
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leaf
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#3
Report Thread starter 18 years ago
#3
I see, thanks.
then, if the name stated Acid Anhydrite, no water was included, right?

Also, can you give me some example of Aliphatic dibasic acid?
i just know it has two ionizable hydrogen atom, what does Aliphatic means?
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#4
Report 18 years ago
#4
(Original post by leaf)
I see, thanks.
then, if the name stated Acid Anhydrite, no water was included, right?
yes
(Original post by leaf)
Also, can you give me some example of Aliphatic dibasic acid?
i just know it has two ionizable hydrogen atom, what does Aliphatic means?
Aliphatic just means any compound that isn't aromatic, NB: an aromatic compound has a benzene ring in it.
So ethandioic acid is an example of an aliphatic dibasic acid.
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king of swords
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#5
Report 18 years ago
#5
(Original post by leaf)
I see, thanks.
then, if the name stated Acid Anhydrite, no water was included, right?

Also, can you give me some example of Aliphatic dibasic acid?
i just know it has two ionizable hydrogen atom, what does Aliphatic means?
Wait a minute....."acid anhydrite" or "acid anhydride"?
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leaf
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#6
Report Thread starter 18 years ago
#6
sorry........>.<
it's Acid Anhydride
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king of swords
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#7
Report 18 years ago
#7
(Original post by leaf)
sorry........>.<
it's Acid Anhydride
Well in that case.......acid anhydride ISN'T just the acid crystal take away the water:
It is the product after removing water from the actual compound of the acid to make (RCO)O(OCR')
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leaf
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#8
Report Thread starter 18 years ago
#8
so, is (HCO)O(OCH) a aliphatic dibasic acid anhydride?

i think i always misunderstand the chemical term in organic chemistry......
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#9
Report 18 years ago
#9
(Original post by leaf)
so, is (HCO)O(OCH) a aliphatic dibasic acid anhydride?

i think i always misunderstand the chemical term in organic chemistry......
yes that is correct.
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leaf
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#10
Report Thread starter 18 years ago
#10
woooooo......

thanks sword~~
i can write up my lab report now~~

thanks~~
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