Method for making 10 mmmL of ammonium acetate aqueous solution
To make 10 mmmL of ammonium acetate aqueous solution, be the first to know the required reagents and utensils. Ammonium acetate reagent, deionized water, electronic balance, volumetric bottle (choose the appropriate specification for the volume of the solution you want, if you want to make a 1-liter solution, choose a 1-liter volumetric bottle), beaker, glass rod, pipette, etc.

First, use the electronic balance to accurately weigh an appropriate amount of ammonium acetate. Due to the molar mass of ammonium acetate being approximately 77.08 grams per mole, to prepare a solution of 1 liter of 10 mmol per liter, according to the formula\ (n = cV\) (\ (n\) is the amount of substance,\ (c\) is the amount concentration of substance,\ (V\) is the solution volume),\ (n = 10 × 10 ^ {-3}\ text {mol/L} × 1L = 0.01mol\), and then according to the formula\ (m = nM\) (\ (m\) is the mass,\ (n\) is the amount of substance,\ (M\) is the molar mass), then\ (m = 0.01mol × 77.08g/mol = 0.7708g\). When weighing, place a clean small beaker on the electronic balance. After peeling and weighing, slowly add ammonium acetate reagent until the number indicated on the balance is\ (0.7708g\).

After weighing, add an appropriate amount of deionized water to the beaker and stir it lightly with a glass rod to promote the dissolution of ammonium acetate. Note that adding too much water should not be too much, so that the ammonium acetate can be fully dissolved.

After the ammonium acetate is completely dissolved, drain the resulting solution with a glass rod and slowly inject it into the selected volumetric bottle. Then rinse the beaker and glass rod with a small amount of deionized water 2-3 times, and the rinsing solution is also injected into the volumetric bottle to ensure that all the solutes are transferred to the volumetric bottle. After

, add deionized water to the volumetric flask to 1-2 cm below the scale line, and use a rubber head dropper to add water dropwise until the concave liquid level of the solution is tangent to the scale line. Cover the volume cork, shake it upside down several times to mix the solution evenly. At this point, 10 mM per liter of ammonium acetate aqueous solution is complete.