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硫与热强碱溶液可生成S 2- 和SO 3 2- ；生成物继续与硫作用得S 2 2- 和S 2 O 3 2- 。过滤后除去过量硫，向滤液中加入一定量的强碱后，再适入足量的SO 2 ，SO 2 与S 2 2- 也完全转化为S 2 O 3 2- 。问： S+SO 2 +OH - 完全转化为S 2 O 3 2- 的离子方程式____________________ amol S最终转化为Na 2 S 2 O 3 ，需SO 2 、NaOH的物质的量分别为________ 若amolS最终转化为Na 2 S z 耗原热碱溶液6molNaOH，则Na 2 S x 中x值为 _________。
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