For the bromization reaction of 4-hydroxybenzaldehyde in chloroform solvent
which results in precipitation of 3-bromo-4-hydroxy benzaldehyde and 3
5-dibromo-4-hydroxybenzaldehyde
the paper presents a method to calculate the concentration of clear liquid with material balance and solubility equations.Based on the above calculation a kinetics equation of 4-hydvoxybenzaldehyde bromization reaction is established.The average relative error between the values of experimental measurement and calculation is 6.37%.