Preparation of 3M potassium acetate

Now to prepare 3M potassium acetate solution, the method is as follows.

Prepare clean utensils, such as beakers, measuring cylinders, balances, glass rods, etc. with suitable capacity. Take an appropriate amount of potassium acetate solid and weigh it accurately with the balance. According to the concentration requirements of 3M, calculate the required mass of potassium acetate according to stoichiometry. Suppose the volume of the solution to be\ (V\) liters and the molar mass of potassium acetate (\ (CH_ {3} COOK\)) is\ (M\) (about 98.15 g/mol), then the required mass of potassium acetate is\ (m = 3\ times V\ times M\) grams.

Weigh the given quality of potassium acetate and place it in a beaker. Use another measuring cylinder to measure an appropriate amount of distilled water and slowly inject it into the beaker containing potassium acetate. At the same time, stir continuously with a glass rod to fully dissolve the potassium acetate. The dissolution process may take some time, make sure that the potassium acetate is completely dissolved in the water and there is no solid residue.

After the potassium acetate is completely dissolved, transfer the solution to an appropriate volume volumetric flask. Rinse the beaker and glass rod with a small amount of distilled water several times, and the rinsing liquid is also injected into the volumetric flask to ensure that the solute is not lost. After that, add distilled water to the volumetric flask to the scale line. The solution obtained at this time is 3M potassium acetate solution. Finally, cap the capacity cork tightly and shake it upside down to make the solution concentration uniform. During the preparation process, attention should be paid to the standardization and accuracy of the operation to obtain a qualified 3M potassium acetate solution.