INVESTIGATION OF THE MECHANISM OF SOUND ABSORPTION BY THE BORIC ACID RELAXATION IN SEA WATER

The dependence of the relaxation frequency and the maximum absorption per wavelength of the boric acid relaxation on B(OH)₃ and NaHCO₃ concentrations are obtained by the cylindrical resonator method. The experimental results may be explained by an apparent single-step process:B(OH)₃+CO₃^2- (total) + H₂O⇌B(OH)₄^- (total)+ HCO₃^2- (total). Theory and experimental results show that the. effects of calcium on the relaxation parameters of the boric acid relaxation can be interpreted by a coupled reaction system, which is equivalent to that apparent single-step process, including all ion association reactions.