U形管中是滴有酚酞溶液的蒸馏水�左右两管中同时逐滴滴加一定量的氢氧化钠稀溶液和稀盐酸.1开始时左管溶液�红色.2充分反应后u形管中 Template




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tomskiu形管中是滴有酚酞溶液的蒸馏水�左右两管中同时逐滴滴加一定量的氢氧化钠稀溶液和稀盐酸.1开始时左管溶液�红色.2充分反应后u形管中 coloring