METHOD FOR DISSOLVING LITHIUM COMPOUND, METHOD FOR MANUFACTURING LITHIUM CARBONATE, AND METHOD FOR RECOVERING LITHIUM FROM LITHIUM ION SECONDARY CELL SCRAP

A method for dissolving a lithium compound according to the present invention includes bringing a lithium compound into contact with water or an acidic solution, and feeding, separately from the lithium compound, a carbonate ion to the water or the acidic solution to produce carbonic acid, and allowing the carbonic acid to react with the lithium compound to produce lithium hydrogen carbonate.