Is Lead Iodide Precipitate Stable Over Time?

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SUMMARY

The stability of Lead Iodide precipitate, formed by mixing Potassium Iodide and Lead Nitrate, remains intact over time when stored in water at room temperature (20-32 degrees Celsius). The precipitate is unlikely to degrade or release gases, especially given that inorganic salts like Lead Iodide are generally stable. Additionally, Potassium Iodide in solid form is also expected to maintain its stability under similar conditions. Overall, the discussion confirms the long-term stability of these compounds in aqueous environments.

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Kushal
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About 6 years ago, I made a precipitate of Lead Iodide in water by mixing Potassium Iodide and Lead Nitrate.

I have kept the precipitate in a test tube.

Would anybody know how stable is the precipitate over time. The temperature has been mostly between 20 and 32 degrees depending on the season (room temperature). Would the precipitate degrade or would any gas form? There is also Potassium Nitrate in solution. Would this degrade as well?

The test tube is almost full of water, and I would think that there is no more than 2 g of lead iodide precipitate in it.

Thank You
 
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Not many things it could decompose into, so I bet it is still there.
 
Thank you! Do you think that would apply to Potassium Iodide solid too?
 
Yes.

Many inorganic salts are stable no matter how long you store them. Not all, but the unstable ones are usually well known.
 

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