an egg in vingear

2007-08-22 8:32 pm

an egg in vingear
what kinds of chemical is the egg shell made of?

what kind of a chemical is vingear?

whaat will happened when the chemical in egg shell and that in vingear come together?

An egg in vingear
List some possible factors that can make the changes described take place faster??

回答 (1)

Uncle Michael

2007-08-22 10:33 pm

✔ 最佳答案

Egg shell is made of calcium carbonate (CaCO3). Vinegar is the aqueous solution of ethanoic acid (acetic acid, CH3COOH).

When egg shell and vinegar come together, calcium carbonate reacts with (dissolves in) ethanoic acid to give calcium ethanoate solution ((CH3COO)2Ca), gas bubbles of carbon dioxide (CO2), and water (H2O). The equation is
CaCO3(s) + 2CH3COOH(aq) → (CH3COO)2Ca(aq) + H2O(l) + CO2(g)

Ways to increase the reaction rate :
(1) Use more concentration vinegar.
(2) Increase the temperature.
(3) Ground the egg shell into power to increase its surface area.

2007-08-22 14:34:10 補充：
Egg shell is mainly (not retirely) made of calcium carbonate.

2007-08-22 14:34:40 補充：
Egg shell is mainly (not entirely) made of calcium carbonate.

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