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电石浆是氯碱工业中的一种废弃物，其大致组成如表所示： 成分 CaO SiO 2 Al 2 O 3 Fe 2 O 3 MgO CaS 其他不溶于酸的物质 质量分数（%） 65～66 3.5～5.0 1.5～3.5 0.2～0.8 0.2～1.1 1.0～1.8 23-26 用电石浆可生产无水CaCl 2 ，某化工厂设计了以下工艺流程： 已知氯化钙晶体的化学式是：CaCl 2 ?6H 2 O；H 2 S是一种酸性气体，且具有还原性． （1）反应器中加入的酸用______． （2）脱色槽中应加入的物质X是______；设备A的作用是______；设备B的名称为______；设备C的作用是______． （3）为了满足环保要求，需将废气H 2 S通入吸收池，下列物质中最适合作为吸收剂的是______．反应的化学方程式为______． A．水B．浓硫酸C．石灰乳D．硝酸 （4）将设备B中产生的母液重新引入反应器的目的是______． （5）氯碱工业电极方程式______．
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