将一包碳酸钾和硫酸钾的混合物溶于蒸馏水配成溶液加入适量的氢氧化钡溶液完全反应滤出并洗涤沉淀然后在沉淀中加入稀硝酸收集到44克无色气体 Template




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tomski将一包碳酸钾和硫酸钾的混合物溶于蒸馏水配成溶液加入适量的氢氧化钡溶液完全反应滤出并洗涤沉淀然后在沉淀中加入稀硝酸收集到44克无色气体 coloring