Coates Sign Flow Graph of Chemical Equilibrium System in Broad Sense Mononuclear Complexes Zhang YuLei, Xie XieZhong, Sun SuJuan (College of Hydraulic Civil Engineering, Shandong Agricultural University, Taian 271018) Abstract The mathematical model of coates sign flow graph of chemical equilibrium system in broad sense mononuclear complexes is proposed. On the basis of generalizing basic algorithm of the graph, the solution which is mixed by dicarboxylic acid (or its salts), strong acid and strong base is taken as the example to illustrate the process of creating the flow graph and to deduce chemical equilibrium relationship by using the calculating rule. Our research results show that the flow graph is intuitionistic, clear and simple and can elucidate the equilibrium system of broad sense mononuclear complexes systemically and generally. Keywords Ion equilibrium, Coates sign flow graph, Mononuclear complexes, Mathematical model 广义单核配合物化学平衡体系的 Coates 信号流图 张玉镭 谢协忠 孙淑娟 (山东农业大学水利土木工程学院 泰安 271018) 摘要 提出了广义单核配合物平衡体系的 Coates 信号流图数学模型。在总结 Coates 信号流图基本运算法则的基础上，以二元酸及其盐、强酸、强碱相混合的溶液为例，详细说明了化学平衡 Coates 信号流图模型的建立过程和 Coates 信号流图运算规则在化学平衡关系式导出中的应用。表明用 Coates 信号流图能够更系统全面地表示广义单核配合物平衡体系，并且具有直观、明了、应用简便的特点。 关键词 离子平衡 Coates 信号流图 单核配合物 数学模型 张玉镭 男，40 岁，主要从事水化学及水处理技术方面的研究。E-mail:vhyulz@sina.com 2003-01-29 收稿 (PDF全文下载c04006)