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本文探索了H_2SO_4与CaCO_3的反应,只要改变CaCO_3的形状或改用H_2SO_4与HCl的混合酸,并控制一定酸的浓渡,即能制备CO_2。
This paper explores the reaction between H_2SO_4 and CaCO_3, and changes the shape of CaCO_3 or uses mixed acid of H_2SO_4 and HCl, and controls the concentration of certain acid to make CO_2.