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    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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    (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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    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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    (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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    (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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    sorry........>.<
    it's Acid Anhydride
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    (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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    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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    (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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    woooooo......

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

    thanks~~
 
 
 
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