【教材内容】本节教材可分为三个部分:一是水的电离平衡及水的离子积,二是溶液的酸碱性和p H,三是中和滴定。在弱电解质电离平衡的基础上,将水看成一种反应物浓度不变的弱电解质,从一般到特殊认识水的电离平衡的特征(水的电离平衡和离子积),逐步认识水溶液中离子浓度的特点(溶液的酸碱性),从定性到定量研究其特征(溶液p H的简单计算),最后考虑其应用(中和滴定实验和应用)。在方法上遵循从一般到特殊,从定性到定量,从简单到 Textbook content The textbook can be divided into three parts: First, ionization of water and water ion balance, the second is the acidity and pH of the solution and p H, the third is neutralization titration. On the basis of the ionization equilibrium of weak electrolyte, we regard water as a kind of weak electrolyte with constant reactant concentration, ionization equilibrium and ion product of water from general to special recognition water, and gradually know the ion concentration in aqueous solution (Acidity and basicity of the solution), its characterization (simple calculation of solution p H) from qualitative to quantitative, and finally its application (neutralization titration experiment and application). Follow the method from general to special, from qualitative to quantitative, from simple to