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先将100毫升1.5%的NaOH溶液慢慢地倒入75毫升6%的CuSO_4溶液中,不久即有蓝色的Cu(OH)_2沉淀生成。待沉淀完毕后,
First, 100 ml of a 1.5% NaOH solution was slowly poured into 75 ml of 6% CuSO 4 solution, and blue Cu(OH) 2 precipitated soon afterwards. After the precipitation is completed,