SnailsAttack
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Interconversion of sodium and calcium sulphate via salt metathesis reactions
Have not tested this but it's hypothetically possible.
Written form
1. Sodium sulphate + Calcium acetate -> Sodium acetate + Calcium sulphate
2. Calcium sulphate + Sodium carbonate -> Calcium carbonate + Sodium sulphate
3. Calcium carbonate + Vinegar -> Calcium acetate + Carbon dioxide + Water
Reaction equations
1. Na₂SO₄(aq) + Ca(CH₃COO)₂(aq) -> 2NaCH₃COO(aq) + CaSO₄(s)¹
2. CaSO₄(aq)¹ + Na₂CO₃(aq) -> CaCO₃(s) + Na₂SO₄(aq)
3. CaCO₃(s) + 2CH₃COOH(aq) -> Ca(CH₃COO)₂(aq) + CO₂(g) + H₂O(l)
1) Sodium sulphate is precipitated as calcium sulphate via a metathesis reaction with calcium acetate. Sodium acetate is produced as a byproduct.
2) Calcium sulphate is converted back to sodium sulphate via precipitation of calcium carbonate via a metathesis reaction with sodium carbonate.
3) The calcium acetate is regenerated by reaction of vinegar on the calcium carbonate byproduct.
In summary, sodium sulphate and calcium sulphate can be interconverted through the use of vinegar and sodium carbonate, which are consumed in the
reaction series as sodium acetate, water and carbon dioxide.
¹ Note that calcium sulphate is denoted as being insoluble in the first equation but not the second. These are relative solubility values; calcium
sulphate is 137x less soluble than calcium acetate, which in turn is 200x more soluble than calcium carbonate.
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Texium
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Thread Moved
7-3-2022 at 13:31 |
B(a)P
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It would be a somewhat interesting little demonstration, though a bit impractical given the volume of water required to make reaction 2 occur.
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SWIM
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So sodium sulfate and calcium acetate eventually yield...
Calcium acetate, water, and carbon dioxide.
Isn't it a lot easier to just not mix your calcium acetate with the sodium sulfate in the first place?
or for a shorter route between calcium acetate and calcium acetate:
Heat calcium acetate in furnace, add vinegar to resulting calcium carbonate.
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SnailsAttack
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Quote: Originally posted by B(a)P  | | It would be a somewhat interesting little demonstration, though a bit impractical given the volume of water required to make reaction 2 occur.
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could probaly envoke le chateliers principle
| Quote: Originally posted by SWIM | So sodium sulfate and calcium acetate eventually yield...
Calcium acetate, water, and carbon dioxide.
Isn't it a lot easier to just not mix your calcium acetate with the sodium sulfate in the first place?
or for a shorter route between calcium acetate and calcium acetate:
Heat calcium acetate in furnace, add vinegar to resulting calcium carbonate. |
the point of this reaction series isn't really to convert calcium acetate to lime, it's to convert sodium sulphate to calcium sulphate and then back
again.
the point of this was that i have a metric assload of calcium acetate from leaching rocks with vinegar and want to see if there's any magnesium
acetate in it by selectively precipitating the calcium using sodium sulphate.
but then i want my sulphate back
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