On the adjustment of the pH value of ammonium acetate solution
If you want to adjust the pH value of ammonium acetate solution, you must first understand its properties. Ammonium acetate is a salt formed by neutralizing acetic acid and ammonia. It has both the hydrolysis of acetate and ammonium in water.

If you want to raise its pH value, you can add a weakly alkaline agent. If an appropriate amount of ammonia water, ammonia water ionizes hydroxide ions, inhibits the hydrolysis of ammonium ions, and promotes the hydrolysis of acetate ions, so that the concentration of hydroxide ions in the solution gradually rises, and the pH value increases. However, the amount of ammonia water added must be accurate, and more of it will be over-alkaline, losing its original intention.

If you want to lower its pH value, you can add weakly acidic substances. If a little acetic acid is added dropwise, acetic acid ionizes hydrogen ions, inhibits the hydrolysis of acetate ions, and promotes the hydrolysis of ammonium ions. The concentration of hydrogen ions in the solution gradually increases, and the pH value decreases. It should also be noted that the amount of acetic acid, when careful, should not be peracidic.

Or according to the principle of buffer solution. To stabilize the pH value of ammonium acetate solution in a certain area, a buffer system of acetic acid-ammonium acetate or ammonia-ammonium acetate can be proportionally matched. According to the Henderson-Hasselbalch equation, the concentration ratio of conjugated acid-base pairs is precisely adjusted to achieve the purpose of stabilizing pH value.

In short, to adjust the pH value of ammonium acetate solution, it is necessary to carefully investigate its hydrolysis, and to obtain the desired pH value according to the required precise selection method and controlled amount.