题目

Long, long ago there was a wise man that used to go to the sea to do his writing. He had a habit of walking on the beach before he began his work. One day he was walking along the shore. As he looked down at the beach, he saw a human figure moving like a dancer. He smiled to himself at the thought that someone would dance on the beach. So he began to walk faster to catch up. As he got closer, he saw that it was a young man and the young man wasn’t dancing, but instead he was reaching down to the shore, picking up something and very gently throwing it into the ocean. As he got closer,肼(N2H4)和亚硝酸钠在化工生产及航天工业中具有十分广泛的应用，下图是以液氨为原料生产肼和亚硝酸钠的工艺流程（肼能与水混溶，形成稳定的N2H4H2O）:回答下列问题:(1)NaNO2中N的化合价为_______。(2)写出在NaClO溶液中通入NH3得到成品液1的化学反应方程式:______________。(3)由成品液2得到成品固体混合物需经过的操作步骤为________________。(4)亚硝酸钠在一定条件下能与无水肼反应生成一种钠氮化合物和水，生成的钠氮化合物中钠的质量分数为35.38%。则反应中氧化剂与还原剂的物质的量之比为_____；该反应中的氧化产物是___________________。(5)已知所得成品固体混合物中含有2种钠盐，若要获得NaNO2产品，则需要除去的物质为_______(填化学式)；使用Pb进行处理时，杂质能转变为NaNO2，而Pb转化成PbO，则这一处理过程发生反应的化学方程式为___________；已知，NaNO2在邻苯二甲酸二丁酯中溶解度远大于在水中的溶解度，而另一钠盐则不具有该性质，若用有机溶剂邻苯二甲酸二丁酯处理成品固体混合物水溶液时，NaNO2 与另一钠盐通过_____(填操作名称)被分离。