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图像类问题是同学们学习离子反应中难点,解答此类试题的关键是:(1)看清横、纵坐标代表的含义,理解图示化学曲线的意义.(2)理清图像变化的趋势,重点把握起点、拐点、终点.突破口在于抓住图像中关键点的含义,涉及到哪些化学反应原理,写出可能发生反应的化学方程式或离子方程式,并与数据结合起来,作出正确的判断.现由Ba(OH)2溶液与Al2(SO4)3溶液反应图联想以下几道题:
Image class problem is the difficulty of students to learn ionic reaction, the key to answer such questions is: (1) to see the horizontal and vertical axis represents the meaning of understand the meaning of the graphic chemical curve (2) to clarify the trend of image changes , To grasp the starting point, inflection point, ending point.The breakthrough lies in seizing the meaning of the key points in the image, which chemical reactions involved in the principle, write down the chemical equation or ion equation may react, and with the data combined to make the right judgments. Now by the Ba (OH) 2 solution and Al2 (SO4) 3 solution reaction diagram Lenovo several questions: