有一包白色固体可能含有k2so4k2co3bacl2koh中的一种或几种.取�量白色固体溶于足量的水中有白色沉淀产生.过滤后�沉淀中滴加 Template




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tomski有一包白色固体可能含有k2so4k2co3bacl2koh中的一种或几种.取�量白色固体溶于足量的水中有白色沉淀产生.过滤后�沉淀中滴加 coloring