Why can boric acid regulate PH?

Why Boric acid can adjust PH Boric acid can adjust pH, mainly from the dissociation reaction of boric acid in water. When boric acid (B(OH)3) is dissolved in water, it will accept the electrophilic water molecules and form a buffer system of boric acid (H3BO3/H2BO3-/BO32-). This buffer system can be transformed according to the change of acidity, so that the pH value of the water is kept within a certain range. Under acidic conditions, boric acid reacts with water molecules to form H3O+ and H2BO3-. Under alkaline conditions, boric acid reacts with water molecules to form OH- and BO32-. This reaction can adjust the pH value of water in different pH ranges, thus maintaining the stability of water and protecting the balance of the biological environment. Because of its buffering effect, boric acid is widely used in many fields, such as geoscience, biochemistry, etc. In practice, boric acid can be used to regulate soil pH, water pH, pH in disinfectants, etc., and can also be used in production of dehydrating agents, preservatives, catalysts, etc. In general, the properties and actions of boric acids are very diverse and important. Precautions when using boric acid to adjust PH: When using boric acid to adjust PH, the following precautions should be taken: (1) Before using boric acid, the PH value of the solution should be determined in order to determine the correct amount of adjustment. (2) When adjusting the PH value, boric acid should be added slowly, so as not to change the PH value of the solution too quickly and cause the solution turbidity. (3) Do not use excessive boric acid, excessive boric acid will lead to too low PH value of the solution, affecting the normal use of the solution. (4) Attention should be paid to the temperature of the solution, too high temperature of the solution will lead to too fast change of the PH value of the solution, and the temperature should be appropriately reduced. If the PH value of the solution changes too quickly, it may lead to turbidity of the solution, because there is a large amount of ammonium borate in the boric acid solution. When the PH value of the boric acid solution changes too quickly, it will lead to the precipitation of ammonium borate and the formation of suspension, thus making the solution turbidized. Solution: (1) The PH value of the solution should be measured first in order to determine the correct amount of adjustment. (2) Then, the temperature of the solution should be appropriately reduced so as not to change the PH value of the solution too quickly. (3) Add boric acid slowly, so that the PH value of the solution gradually increases, so as not to turbidity of the solution. (4) Do not use excessive boric acid, so as not to affect the normal use of the solution because the PH value of the solution is too low. In the electroplating industry, boric acid is often used as a buffer, widely used in nickel plating, nickel plating alloy, electroless nickel plating, zinc plating, chromium plating and chemical conversion film technology, mainly play a role in adjusting the PH value of the solution, refining the coating, mentioned brightness. Boric acid can adjust the PH value, mainly from the dissociation reaction of boric acid in water. As we all know, boric acid is a weak acid. When boric acid (B(OH)3) is dissolved in water, it will accept the electrophilic water molecules and form a buffer system of boric acid (H3BO3/H2BO3-/BO32-). This buffer system can be transformed according to the change of acidity, so that the pH value of the water is kept within a certain range. Under acidic conditions, boric acid reacts with water molecules to form H3O+ (hydronium ion) and H2BO3-; Under alkaline conditions, boric acid reacts with water molecules to form OH- (hydroxide ion) and BO32-. This reaction can adjust the pH value of water in different PH ranges, thus maintaining the stability of water and affecting the pH value of the solution.