1.依据物质的特殊性质(颜色、状态、气味和溶解性等)为突破口进行推理.初中常见特殊颜色的物质有:①红色:红磷、铜、氧化汞;②红褐色:氧化铁、氢氧化铁;③黄色:硫磺、铁盐溶液;④绿色:碱式碳酸铜;⑤浅绿色:亚铁盐溶液;⑥蓝色:氢氧化铜、胆矾、铜盐溶液;⑦淡蓝色:液氧(固态氧); 1. Based on the specific properties of the substance (color, state, odor, solubility, etc.) as a breakthrough reason. The common special colors of junior middle school materials are: 1 Red: red phosphorus, copper, mercury oxide; 2 Red brown: Iron oxide, hydrogen Iron Oxide; 3 Yellow: Sulfur, Iron Salt Solution; 4 Green: Basic Copper Carbonate; 5 Light Green: Ferrous Salt Solution; 6 Blue: Copper Hydroxide, Cholesterol, Copper Salt Solution; 7 Light Blue: Liquid Oxygen (solid oxygen);