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实验步骤称取FeSO_4·7H_2O晶体约5克(应是淡绿色),用蒸馏水配制为5%左右的硫酸亚铁溶液。放入一、二枚光亮铁钉,并滴入几滴稀H_2SO_4溶液。塞紧瓶盖,备用。1.用滴管吸取硫酸亚铁溶液二至三滴放于
The experimental procedure weighed about 5 grams of FeSO_4·7H_2O crystals (should be light green), and prepared about 5% ferrous sulfate solution with distilled water. Place one or two bright nails and add a few drops of dilute H2SO4 solution. Tighten the bottle cap and use it for backup. 1. Draw two to three drops of ferrous sulfate solution with a pipette