人教版高中化学(选修4)第71页在研究电化学基础时,提到铜锌原电池2个半电池的2种电解质溶液之间需要用盐桥连接起来。盐桥在实验中起到沟通电路、保持电荷平衡、使反应得以继续进行的作用。然而,一般实验室并无现成的盐桥,通常都是随用随制,其传统制备方法是用琼脂—饱和KCl PEP (High School Chemistry) (elective 4) p.71 When studying the fundamentals of electrochemistry, it was mentioned that salt electrolytes should be connected between two electrolyte solutions of two and a half cells of a copper-zinc primary cell. Salt Bridge in the experiment play a communication circuit to maintain the charge balance, so that the reaction can continue to play a role. However, there is no existing salt bridge in the general laboratory, which is usually used with the system. The traditional preparation method is to use agar-saturated KCl