RogueRose
International Hazard
Posts: 1593
Registered: 16-6-2014
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Lead Acetate solution look like chocolate milk
I mixed some Pb and PbO with some 5% and 30% acetic acid and at first the liquid turned a cloudy white and then after some heating & stirring the
liquid turned a color of chocolate milk only a little lighter, not quite as deep brown. While on heat the solution holds very fine particulate in
suspension but once removed from heat (filled a flask to allow to settle) the particulate settled on the bottom and it has the same color as the
brownish liquid but maybe a little whiter. The particulate reminds me of CaCO3 or CaSO4 settling out of solution.
The PbO that I added was the result of heating lead to very hot temps & pouring the metal off, the remainder that was oxidized looked grey but was
crumbly and could be crushed to leave a yellow powder. The heating was done in a soup can so I guess there was the possibility of some iron oxide
getting mixed into it but the amount of PbO to Pb was about 1:40 ratio, so there couldn't be that much iron oxide in the lead oxide to make it look
this brown IMO.
When I filter the brown solution I do end up with a clear liquid so it seems that the color is largely due to the particulate in the
suspension/solution.
I did add a little H2O2 into the mix but the color had already started to turn brown and this seemed to accelerate the process somewhat.
Has anyone experienced this when making PbOAc and do you know what it may be?
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The Austrian Scientist
Harmless
Posts: 30
Registered: 1-1-2018
Location: Austria
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Mood: Analytical
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Try to dissolve some of the brown stuff and ad some K4[Fe(CN)6]*+3 H2O
if a blue percipitate forms you know its Fe
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woelen
Super Administrator
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Registered: 20-8-2005
Location: Netherlands
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Mood: interested
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The brown color also may be due to formation of PbO2. Maybe you have some lead(IV) oxide in your mix.
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