The experiments proved that the first stage reaction-lanthanum nitrate /sodium hydroxide reaction was a second order reaction and its kinetic equation was-dcA/dt=25.5c2A.

• 经实验验证；第一阶段硝酸镧/氢氧化钠盐碱反应为二级反应；动力学方程为-dcA/dt=25.；5c2A。