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2017年高考新课标理综卷Ⅰ中的化学第13题——数形结合题,因试题情境新颖、曲线简洁直观、设问角度深刻、计算灵活多变、能力要求高而给人眼前一亮的感觉,体现了命题专家高超的命题智慧,受到广大教师的一致好评,本文就该题作出分析,与同行分享.一、原题常温下将NaOH溶液滴加到己二酸(H_2X)溶液中,混合溶液的pH与离子浓度变化的关系如图1
Chemistry of the 2017 New Tests Comprehensive Course Volume I Chemistry 13th - the combination of the number of questions, because of the novel situation test, the curve is simple and intuitive, the question asked a profound angle, flexible calculation, high capacity and give the immediate Bright feeling, reflecting the proposition experts superb proposition wisdom, by the majority of teachers alike, this article to make an analysis of the problem, share with peers.Originary at room temperature NaOH solution was added dropwise to adipic acid (H_2X) solution In the mixed solution pH and ion concentration changes in the relationship shown in Figure 1