Why does the acid weaken the eggshell?

Online Answer
Acids react with calcium carbonate, breaking it apart into calcium (which is carried off in the water) and carbon dioxide gas. The more acidic a liquid is, the faster the reaction and the more the shell will weaken.
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The FASEB/LSRO report on the safety of amino acids as dietary supplements concluded the following: There is no nutritional rationale to the use of amino acids as dietary supplements, and such a practice can be dangerous. Supplemental amino acids are used for pharmacological rather than nutritional purposes..
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