Pentamoacetic acid formula

Required materials
1. Acetic acid (glacial acetic acid, $CH_3COOH $)
2. Ammonia water ($NH_3\ cdot H_2O $)
3. De-watering water

Operation steps
1. ** Suitable container **: Take a large and large volumetric bottle or cup to contain the most suitable solution. If you want to prepare a solution with high precision, use a volumetric bottle.
2. ** Calculation dosage **:
- pentamorphic acid solution per liter ($5M $), if the solution is matched with $V $liter, the amount of acetic acid and ammonia water should be calculated according to the friction of the formula $CH_3COONH_4 $. The amount of acetic acid is $77.08g/mol $. The required amount of acetic acid is $m = 5mol/L\ times V L\ times77.08g/mol $.
- due to the reaction of acetic acid and ammonia to generate acetic acid, the inverse equation is $CH_3COOH + NH_3\ cdot H_2O\ rightarrow CH_3COONH_4 + H_2O $, and the inverse friction ratio is 1 dollar: 1 $. According to the ratio of the amount of acetate, the required amount of acetic acid and ammonia is calculated. For example, if you want to prepare $1L $of $5M $acetic acid solution, you need $5mol $of acetic acid and $5mol $of ammonia water.
3. ** Measure the product **:
- Use a pipette or measuring cylinder to measure the calculated amount of acetic acid. Acetic acid is corrosive, so you need to be careful with handling, wear anti-corrosive equipment, such as gloves, eyes, etc.
- Same, use a pipette or measuring cylinder to measure the required amount of ammonia. Ammonia is easy to use and has an irritating smell, and the operation should be carried out in a general tube.
4. ** Mixing reaction:
- Pour the measured acetic acid slowly into a container containing part of the desalination water and mix well.
- Add the measured ammonia water slowly to the above solution and mix well. This time, it will neutralize and react to generate acetic acid. A certain amount may be released during the reaction process, pay attention to the mixing and dispersion.
5. ** bandwidth evaluation dilute **:
- After the reaction is complete and the solution is cooled to the chamber, the solution will be moved to a volumetric bottle (if using a cup, use a funnel to move). Wash the container with a small amount of desalination water several times, and the washing liquid will be moved to the volumetric bottle to ensure that the product is completely removed.
-Add water to the volumetric flask until it is close to the scale
, use a dropper to add dropwise, until the concave liquid surface of the solution is tangent to the scale
, and the acetic acid solution of $5M $is obtained.

Note
1. During the operation process, due to the decay of acetic acid, ammonia water is easy to decay and irritating, it is necessary to operate in a good environment and wear necessary anti-decay supplies.
2. Measure the product
, pay attention to the accuracy of the meter to ensure the accuracy of the solution
3. Mix the reaction and bandwidth evaluation process, and it is necessary to fully mix and decay to make the solution uniform.