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6.（6 分）下列有关仪器使用方法或实验操作正确的是（（）

Gaokao · Chemistry · previous-year question

  1. A.洗净的锥形瓶和容量瓶可以放进烘箱烘干
  2. B.酸式滴定管装标准溶液前, 必须先用该溶液润洗
  3. C.酸碱滴定实验中, 用待滴定溶液润洗雉形瓶以减小实验误差
  4. D.用容量瓶配溶液时, 若加水超过刻度线, 立即用滴管吸出多余液体

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