Materials Required for Preparation of 0.1 M Ammonium Acetate Solution
1. ** Ammonium Acetate ($NH_4CH_3COO $) **: Analytically Pure.
2. ** Deionized Water **: Ensure that the water quality is pure and free of impurity interference.
3. ** Electronic Balance **: The accuracy needs to meet the requirements of accurately weighing the quality of ammonium acetate.
4. ** Volumetric Flask **: 1000 mL volumetric flask for accurate formulation of solution volume.
5. ** Glass Rod **: Used for stirring to accelerate the dissolution of ammonium acetate.
6. ** Beaker **: Appropriate size for dissolving ammonium acetate.

Operation steps
1. ** Calculate the mass of ammonium acetate **:
- According to the formula $n = cV $ (where $n $is the amount of substance, $c $is the amount of substance concentration, $V $is the solution volume), to prepare 1 L 0.1 M ammonium acetate solution, the amount of ammonium acetate is $n = 0.1 mol/L × 1 L = 0.1 mol $.
- The molar mass of ammonium acetate ($NH_4CH_3COO $) is $M = (14 + 4 × 1 + 12 + 3 × 16 + 12 + 1 × 3) g/mol = 77 g/mol $.
- Then the desired mass of ammonium acetate $m = nM = 0.1 mol × 77 g/mol = 7.7 g $.
2. ** Weigh ammonium acetate **:
- Place the electronic balance on a horizontal table and zero for calibration.
- Place a clean weighing paper on the balance and accurately weigh 7.7 g of ammonium acetate.
3. ** Dissolve ammonium acetate **:
- Pour the weighed ammonium acetate into a beaker of appropriate size and add about 500 mL of deionized water.
- Gently stir with a glass rod so that the ammonium acetate is fully dissolved. Be careful not to splash out the solution during stirring.
4. ** Transfer solution **:
- The dissolved ammonium acetate solution will be drained through a glass rod and slowly transferred to a 1000 mL volumetric flask.
- Rinse beakers and glass rods 2-3 times with a small amount of deionized water. Transfer all the rinsing liquid to the volumetric flask each time to ensure that all solutes are transferred.
5. ** bandwidth evaluation **:
- Continue to add deionized water to the volumetric flask until the liquid level is close to the scale line 1-2 cm.
- Use a rubber head dropper to add deionized water dropwise, and look at the scale line head-up, so that the lowest point of the concave liquid level of the solution is tangent to the scale line.
6. ** Shake well **:
- Cover the cork of the volumetric bottle, hold the cork with your index finger, and hold the bottom of the bottle with your other hand. Repeatedly turn the volumetric bottle upside down and shake the solution well to make the concentration of the solution uniform.

At this point, the 0.1 M ammonium acetate solution has been prepared. You can transfer it to a suitable reagent bottle, label it, indicate the name of the solution, concentration, preparation date and other information, and keep it properly for later use.