用质子条件的一种数学表达式,即:[H~+]=[OH~-]+a-b+∑ni[碱]i-∑mj[酸]j,来直接书写任一酸碱平衡体系质子条件式的方法——简称公式法。本文介绍了用公式法书写质子条件的方法要点、公式的推导及应用示例。用公式法书写质子条件式,具有简便迅速、准确可靠的特点,对复杂、混合酸体系尤为适用。 Use a mathematical expression of the proton condition, ie, [H~+]=[OH~-]+a-b+∑ni[base]i-∑mj[acid]j, to directly write any acid-base balance system. Proton conditional method - referred to as the formula method. This paper introduces the main points of the method of formulating proton conditions by formula method, the derivation of formulas and application examples. Writing the proton condition formula by the formula method is simple, rapid, accurate and reliable, and is particularly suitable for complex and mixed acid systems.