Preparation of zinc acetate dihydrate
In order to make zinc acetate dihydrate (Zinc Acetate Dihydrate), it is necessary to clarify the method.

The first preparation of various substances, zinc granules (zinc granules), acetic acid (acetic acid), distilled water (distilled water), etc. It is necessary to use an appropriate amount of zinc granules in a clean vessel, and slowly inject acetic acid into it. The second should be moderate. A little excess of zinc can keep acetic acid for use, and avoid residual acid in the next step. At this time, there is a bubble raw, which is the phase of zinc and acetic acid, and the corresponding formula is: $Zn + 2CH_3COOH = Zn (CH_3COO) _2 + H_2 ↑ $.

After the application is completed, the contents of the container are still, so that the zinc is not settled. Take the supernatant and filter it with filter paper to remove insoluble matter and obtain the clear liquid. Move the supernatant to an evaporating dish, steam slowly over low heat, so that the water is gradually lost and the solution is gradually thickened. Until the crystalline film is on the liquid surface, stop heating.

Put the evaporating dish in a cool place and let it crystallize from cooling. Soon, there is a crystal, which is zinc acetate crystal. Then filter it with a Brinell funnel to obtain zinc acetate crystal. Rinse the crystal with a small amount of cold water to remove the impurities attached to the surface.

Take the resulting zinc acetate crystal, add an appropriate amount of distilled water, and heat to dissolve it completely. After the previous slow steaming, crystallization, suction filtration steps, so that the crystal purity is higher.

At the end, the purified zinc acetate crystal is placed in a suitable environment to make it absorb water into zinc acetate dihydrate. In this way, zinc acetate dihydrate products can be obtained. When preparing, all steps should be careful, temperature control and quantity control, in order to obtain excellent production.