Three moles of potassium acetate (pH 5.5) formula
Now to prepare a solution of 3m potassium acetate and pH 5.5, the method is as follows:

Prepare the required utensils, such as glass containers with adequate capacity, accurate scales, stirring utensils, and pH measuring instruments.

Weigh an appropriate amount of potassium acetate solid, and after accurate calculation, according to chemical reasons, the amount can be prepared to obtain a solution of 3m. Pour potassium acetate into a washed and dry container.

Slowly inject an appropriate amount of distilled water, and stir it at a constant speed with a mixer while pouring to promote its dissolution. This process requires patience and meticulousness, so that the potassium acetate is completely dissolved in the water.

After the potassium acetate is generally dissolved, measure the pH value with a pH measuring instrument. If the pH value is not 5.5, adjust it. If the pH value is too high, add the dilute acetic acid solution dropwise, add one drop each, stir well and then measure the pH until it reaches 5.5; if the pH value is too low, slowly drop in the dilute potassium hydroxide solution. Similarly, measure while adding, until the pH is 5.5.

After the adjustment is completed, confirm the volume of the solution again. If there is any deviation, increase or decrease the amount of distilled water to make the solution finally reach the required amount, and the concentration is precisely 3 meters, and the pH is stable at 5.5.

In this way, a solution of 3 meters of potassium acetate and pH 5.5 is obtained, which can be used for subsequent use.