“岩盐之都”河南叶县盛产食盐。食盐的主要成分NaCl由        

“岩盐之都”河南叶县盛产食盐。食盐的主要成分NaCl                 (填“分子”、“原子”或“离子”)构成;除去食盐水中泥沙等不溶性杂质的方法是         

    电解食盐水可制烧碱:2NaCI+2H2O======2NaOH+H2+X↑,则X的化学式为                          

答案

离子  过滤  Cl2

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