判断纯碱中是否混有小苏打下列实验方案正确的是 A.滴加盐酸观察是否有气体产生b.溶于水后滴加氯化钙溶液观察是否有白色沉淀生成c.用如 Template




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tomski判断纯碱中是否混有小苏打下列实验方案正确的是 a.滴加盐酸观察是否有气体产生b.溶于水后滴加氯化钙溶液观察是否有白色沉淀生成c.用如 coloring