Alpine2048
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Posts: 6
Registered: 27-1-2020
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Sodium Sulfate Solution turned cloudy when heated
I recently made some sodium sulfate and magnesium carbonate from a metathesis reaction between magnesium sulfate and sodium carbonate. I filtered off
the magnesium carbonate precipitate and re-filtered the sodium sulfate filtrate. When I heated it under modest temperatures (~50C) the solution turned
cloudy white with precipitate.
I'm not sure if it is magnesium carbonate (MgCO3 has a really low solubility in water) and I'm wondering if a reverse reaction is happening here.
Thanks,
Alpine
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Fery
International Hazard
Posts: 1015
Registered: 27-8-2019
Location: Czechoslovakia
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max solubility at 30 C and then decreases on heating (inverted solubility curve) - maybe this is your case, if not then some impurities
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Alpine2048
Harmless
Posts: 6
Registered: 27-1-2020
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Nevermind,
I made a rookie mistake. It turns out that the reaction doesn't go to completion without heating, and I filtered it without heating, so when I went to
boil the solution, the rest of the products precipitated. I went ahead and filtered it after boiling the solution down.
Thanks though!
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