Zinc acetate
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| Zinc acetate | |
|---|---|
| Names: | zinc acetate zinc diacetate zinc ethanoate Е650 food additive |
| Formula: | Zn(CH3COO)2 (anhydrous) Zn(CH3COO)2 · 2H2O (dihydrate) |
| Molar mass: | 183.478 g/mol (anhydrous) 219.507 g/mol (dihydrate) |
| Density: | 1.84 g/cm3 (anhydrous) 1.735 g/cm3 (dihydrate) |
| Crystal system: | tetragonal (anhydrous) α=90°, β=90°, γ=90° monoclinic (dihydrate) a=14.5 Å, b=5.32 Å, c=11.02 Åα=90°, β=100°, γ=90° |
| Shapes: |
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| Color: | colorless |
| Decomposition point: | 237 °C510.15 K <br />458.6 °F <br />918.27 °R <br /> (anhydrous) |
| Refractive index: | 1.357 (dihydrate) |
| Magnetic properties: | diamagnetic χ=-1.01 · 10-4cm³/mol |
| Stability: | stable (dihydrate) |
| Hardness: | fragile |
| Toxicity: | non-toxic LD50=2510mg/kg |
Description
Organic compound, salt of transitional metal zinc and organic acetic acid. From water solutions crystallizes as dihydrate.
Reaction between zinc hydroxycarbonate, hydroxide or oxide and acetic acid
Chemical equation:
100.00g of zinc acetate dihydrate а 51.21g of hydroxycarbonate or 45.28g of hydroxide or 37.08g of oxide and 78.16g of 70% acetic acid is required.Add acid to the flask, then add small parts of zinc compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.
Reaction between zinc powder and acetic acid
Chemical equation:
100.00g of zinc acetate dihydrate а 29.79g of pure zinc and 78.16g of 70% acetic acid is required.Add hot acid solution to the flask, then add zinc pieces, shavings or powder and stir it until gas emission will stop.
Electrolysis of acetic acid solution with zinc anode
Chemical equation:
100.00g of zinc acetate dihydrate а 29.79g of zinc and 78.16g of 70% acetic acid is required.Add to the flask acid acetic solution, then place there zinc electrodes and plug them to 1.5-5 V power supply. After some time crystal growth will begin at cathode.
Reaction between zinc chloride, sulfate or nitrate and excess of concentrated acetic acid
Chemical equation:
100.00g of zinc acetate dihydrate а 94.92g of zinc chloride tetrahydrate or 131.00g of zinc sulfate heptahydrate or 135.52g of zinc nitrate hexahydrate and 54.72g of glacial acetic acid is required.Add to the flask with hot iron compounds solution a acid solution with stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of glacial acetic acid, then filter the solution and use it for crystal growing.
Reaction between zinc nitrate and sodium acetate
Chemical equation:
100.00g of zinc acetate dihydrate а 135.52g of zinc nitrate hexahydrate and 123.99g of sodium acetate trihydrate is required.Add to the flask with hot zinc nitrate solution a sodium acetate solution with stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of cold water, then filter the solution and use it for crystal growing.
Reaction between zinc sulfate and calcium or lead(II) acetate
You can use zinc chloride instead of sulfate if you use lead salt..
Chemical equation:
100.00g of zinc acetate dihydrate а 94.92g of zinc chloride tetrahydrate or 131.00g of zinc sulfate heptahydrate and 80.26g of calcium acetate monohydrate or 172.81g of lead(II) acetate trihydrate is required.Add to the flask with calcium or lead acetate solution small parts of zinc salt solution and stir. The large amount of poorly soluble precipitate will form. Settle it out and discard, then filter the solution carefully.
Dirty compound grows as complex polycrystalline prism. After purification changes form to hexagonal prism.
Keep in its original form or under several layers of varnish at average humidity and room temperature. Do not keep crystals near heaters.
| Temperature | g/100,00 g water | g/100,00 g ethanol | g/100,00 g methanol | g/100,00 g diethyl ether | g/100,00 g acetic acid | g/100,00 g hydrazine | ||
|---|---|---|---|---|---|---|---|---|
| (anhydrous) | (dihydrate) | (anhydrous) | (dihydrate) | (anhydrous) | (anhydrous) | (anhydrous) | (anhydrous) | |
| 20°C293.15 K <br />68 °F <br />527.67 °R <br /> | 39.86 | 43 | 4.22 | 4 | ||||
| 25°C298.15 K <br />77 °F <br />536.67 °R <br /> | 40.15 | ~44.5 | 3.5 | 1.9 | ||||
| 40°C313.15 K <br />104 °F <br />563.67 °R <br /> | 0.015 | |||||||
| 70°C343.15 K <br />158 °F <br />617.67 °R <br /> | 1.9 | 0.1 | 0.117 | |||||
| 80°C353.15 K <br />176 °F <br />635.67 °R <br /> | 221 | |||||||
| 100°C373.15 K <br />212 °F <br />671.67 °R <br /> | 44.72 | 66.6 | 95.57 | |||||
Gallery
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Growth from dirty compoundZinc acetate, Maxim Martinov, VKontakteVKontakte
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Growth from dirty compoundZinc acetate, Maxim Martinov, VKontakteVKontakte
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Growth from purified compoundZinc acetate, Maxim Martinov, VKontakteVKontakte
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Growth from purified compoundZinc acetate, Maxim Martinov, VKontakteVKontakte
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