Lead(II) acetate

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   Lead(II) acetate   
Names: lead(II) acetate
lead dicetate
plumbous acetate
lead(II) ethanoate
lead sugar
sugar of lead
sugar acetate
salt of Saturn

Formula: Pb(CH3COO)2 (anhydrous)
Pb(CH3COO)2 · 3H2O (trihydrate)
SMILES: CC(=O)O[Pb]OC(=O)C
Molar mass: 325.288 g/mol (anhydrous)
379.332 g/mol (trihydrate)
Density: 3.25 g/cm3 (anhydrous)
2.55 g/cm3 (trihydrate)
Crystal system: monoclinic (trihydrate)
a=15.85 Å, b=7.3 Å, c=9.1 Åα=90°, β=109.8°, γ=90°
Shapes:
https://media.crystalls.info/w/uploads/media/Truncated_tetragonal_bipyramid.json
https://media.crystalls.info/w/uploads/media/Prolongated_hexagonal_prism.json
https://media.crystalls.info/w/uploads/media/Prolongated_tetragonal_pedion.json

Color: colorless
Melting point: 280 °C553.15 K <br />536 °F <br />995.67 °R <br /> (anhydrous)
75 °C348.15 K <br />167 °F <br />626.67 °R <br /> (trihydrate)
Magnetic properties: diamagnetic
Stability: erodes during a day (trihydrate)
Hardness: fragile
Toxicity: moderately toxic
LD50=300mg/kg

Description

Organic compound, salt of bivalent metal lead and organic acetic acid. From water solutions crystallizes as trihydrate.

Precursors

Reaction between lead(II) oxide, hydroxide or carbonate and acetic acid

Chemical equation:

2CH3COOH + PbO = Pb(CH3COO)2 + H2O
2CH3COOH + Pb(OH)2 = Pb(CH3COO)2 + 2H2O
2CH3COOH + PbCO3 = Pb(CH3COO)2 + 2H2O + CO2


For preparation of 100.00g of lead(II) acetate trihydrate а 70.44g of carbonate or 63.59g of hydroxide or 58.84g of oxide and 45.23g of 70% acetic acid is required.

Add acid to the flask, then add small parts of lead 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 pure lead powder and acetic acid

This process is enough slow, but with heating and under the influence of athospheric oxygen or other oxidizers it becomes much faster. The best result gives using a chlorine bleach..
Chemical equation:

2CH3COOH + Pb + NaClO = Pb(CH3COO)2 + NaCl + H2O


For preparation of 100.00g of lead(II) acetate trihydrate а 54.62g of lead pure, 490.61g of 4% bleach and 45.23g of 70% acetic acid is required.

Add hot acid solution to the flask, then add bleach and lead pieces, shavings or powder and stir and heat it until gas emission will stop.

Influence of pH level

Decreasing pH level with, for example, acetic acid, leads to growing more flat crystals.

Storage conditions

For crystal storing use hermetic vessel with small amount of saturated solution at the bottom or place wadding moistened with such solution. You can use such alternatives as vessel with vaseline or vegetable oil, organic non-hygroscopic solvent (kerosene, benzine or paraffin). Also you can use acrylate polymer or another kinds of solidifying plastic.

Solubility

Temperatureгр/100,00 гр waterгр/100,00 гр ethanolгр/100,00 гр methanolгр/100,00 гр glycerolгр/100,00 гр formic acid 95%
(anhydrous)(trihydrate)(anhydrous)(anhydrous)(trihydrate)(anhydrous)(trihydrate)(anhydrous)
0°C273.15 K <br />32 °F <br />491.67 °R <br />19.8~23.9
10°C283.15 K <br />50 °F <br />509.67 °R <br />29.5~36.2
15°C288.15 K <br />59 °F <br />518.67 °R <br />~36.9~46.0~35.7374.7520
20°C293.15 K <br />68 °F <br />527.67 °R <br />44.31~55.8143
25°C298.15 K <br />77 °F <br />536.67 °R <br />55.2~70.90.40.99
30°C303.15 K <br />86 °F <br />545.67 °R <br />69.5~91.6
40°C313.15 K <br />104 °F <br />563.67 °R <br />116~167.6
50°C323.15 K <br />122 °F <br />581.67 °R <br />218.3~399.4
70°C343.15 K <br />158 °F <br />617.67 °R <br />102.75214.95
Soluble in acetic acid and isopropanol. Slightly soluble in ethanol.


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