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Questions tagged [precipitation]

For questions related to the chemical reactions and processes that result in a chemical reaching its solid phase.

From Wikipedia,

Precipitation is the creation of a solid from a solution. When the reaction occurs in a liquid solution, the solid formed is called the 'precipitate'. The chemical that causes the solid to form is called the 'precipitant'. Without sufficient force of gravity (settling) to bring the solid particles together, the precipitate remains in suspension

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How do Precipitation Reactions behave in the Absence of Gravity?

How do precipitation reactions behave in the absence of gravity, say on the International Space Station (ISS)? I have seen water taking the shape of a sphere and not that of the container in space due to its surface tension. It takes a spherical…
Vishnu
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Co-precipitation particle size

If we are creating a precipitate of (say) Barium Sulfate from a solution of Barium Chloride mixed with Sodium Sulfate, what determines the particle size? I assume one of the factors will be concentration of reactants in the solutions, but what else?
Dirk Bruere
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Alkalinity in Water

If you add Alum - $\ce{Al2(SO4)3}$, to a clay water sample which contains $\ce{Ca(HCO3)2}$ - due to the water's alkalinity, the pH of this water sample would drop as Alum drops the pH levels. How would you counteract this imbalance. As in, what…
Bob Dylan
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What are the products of a reaction between copper sulfate and sodium bicarbonate?

I have been trying for a while to determine what products are produced when copper sulfate reacts with sodium bicarbonate at room temperature and standard pressure. However, while I was looking, I found conflicting information concerning what…
Markovian8261
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Separating out iron from ferrous sulfate

I don't need to necessarily separate pure iron, but from a ferrous sulfate solution, I am trying to form a precipitate with iron. By getting a precipitation of an iron compound, I can find out the amount of iron in the solution. Any help would be…
hayne newell
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Will calcium concentrations be reduced when water is boiled at lower atmospheric pressure?

It's well documented that one can reduce calcium concentrations in water by boiling the water. This is caused by CO2 being driven out of the water and the calcium precipitating out of solution. Ok, but, would calcium drop out of solution if the…
Malte
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Precipitation of Cu2+ and Pb2+ ions

Hi chemistry enthusiasts! I am working on my scholarship exam practice. I believe this exam assumes high school + first year university knowledge although the standard may be varied across the world. And I'm not quite sure what I did wrong. Could…
Trey Anupong
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Why does precipitate always form so naturally?

Whether be it from a textbook or teacher, precipitation reactions always occur by rearranging the elements: For example But then, aren't there other factors you have to bare in mind when predicting such reactions? Like electronegativity: obviously…
most venerable sir
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Why do aluminum, magnesium, and calcium form white precipitate when mix with sodium hydroxide?

Why do aluminum, magnesium, and calcium form white precipitate when mix with sodium hydroxide? Shouldn't there be no reaction? Because sodium is more reactive than all of those element, it should be impossible for sodium to be displace by those…
user28603
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Remove carbon dioxide from solution

What solution could I add to a solution of water with dissolved carbon dioxide in order to get the carbon to precipitate out? I believe the ions are H+ and HCO3- Thanks, Jerid
Jarod Laclair
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Amonium perchlorate

I want to make amonium perchlorate, having amonium chlorate. If I have a solution of sodium chlorate and I add amonium chlorate, will precipitate into amonium perchlorate? Or it is with a solution of sodium perchlorate?
Bruno Mondelo
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