[Jaques]

Wow...so this is organic chem? awhole lot different than hs chem.. That's for sure.

Well its gonna take some time for me to absorb and understand this .

but wow, thanks. I think i have a better understanding of the reaction! Now to learn the scientific part.

[constant thinker]

Yea, I realized a long time ago organic chem is pretty in depth. I understand now. Thank you everyone I understand now. Borek and Alberto_Kravina, I've given you both scooby snacks for helping me to understand organic acids better.

[billnotgatez]

http://www.exploratorium.edu/cooking/eggs/eggcomposition.html

http://www.enchantedlearning.com/subjects/birds/label/chickenegg/answers.shtml

http://www.oeuf.ca/en/encyclopedie/oeufnatomie/


I wonder what other parts of the egg acetic acid react with

http://en.wikipedia.org/wiki/Calcium_carbonate

http://en.wikipedia.org/wiki/Acetic_acid

Is the combining of Calcium carbonate and Acetic acid considered a weak base - weak acid reaction?

[k1027iwi]

You all seemed to have left out the generation of oxygen in this reaction.  Oxygen must have been generated as well as carbon dioxide, since the only way the chemical reaction could be balanced involves oxygen:

2Ca(CO)₃ + 4CH₃COOH --> 2Ca(COCH₃)₂ + 4CO₂ + 2H₂0 + 3O₂

By the way, acetic acid is denoted: HOAc, not HAc; Ac denotes O=CCH₃

[k1027iwi]

by

Ac denotes O=CCH₃

I meant the CH₃CO^-, I'm sure it could also be used to denote the CH₃COO^-
but acetic acid is more commonly denoted as HOAc in journals and articles.  Sorry, I'm just picky

[pantone159]

I meant the CH₃CO^-, acetic acid is more commonly denoted as HOAc in journals and articles.

I would like to think that Ac always means the same thing in regards to 'acetate'.  HOAc for acetic acid is what I have noticed most often.  It is bad enough that another element already has that symbol.  Is there an official meaning to 'Ac' in chemistry?  (Other than actinium!)

[billnotgatez]

k1027iwi

Since you are being the picky point person could you answer my question?

Is the combining of Calcium carbonate and Acetic acid considered a weak base - weak acid reaction?
[end quote]

[k1027iwi]

billnotgatez.

Yes, this reaction would be considered a weak acid - weak base reaction, considering that the pH of calcium carbonate is about pH 8, which is pretty weak.

btw, before anyone catches my idiocy with the equation, I realized I made a mistake:

2 CH₃COOH_(aq) + CaCO_3(s) -->  Ca₊₂(aq) + CO_2(g) + 2 CH₃COO^-_(aq) + H₂O_(l)

There.  Now we're all happy 

[Borek]

the pH of calcium carbonate is about pH 8, which is pretty weak.

Can you elaborate on what you mean?

[Alberto_Kravina]

Ksp CaCO3 [2.8 10-9]. Pretty insoluble salt, I wonder how you calculated the pH...

Maybe you meant the pH of calcium acetate, but also in this case you have to know the concentration..

[billnotgatez]

Alberto_Kravina

Do you consider the reaction between Calcium carbonate and Acetic acid a weak base - weak acid reaction?

[Alberto_Kravina]

Yeah...acetic acid is a pretty weak acid (pKa=4,75), carbonate anion (which is the base in this case) is a medium-strong base (since it is the conjugated base of carbonic acid). The carbonate anion is not such a weak base, though....

[Borek]

Problem with carbonic acid is that it is probably stronger than we think, just the Ka we observe is influenced by the H₂O + CO₂ <-> H₂CO₃ equilibrium - as it is moved to the left real concentration of H₂CO₃ is much lower than used in Ka expression.