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Questions tagged [solubility]

For questions related to the solubility of compounds in various solvents, especially in water. Do not confuse with [solutions] or [aqueous-solution].

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when preparing a supersaturated solution, does the crystalization occur immediately?

I have gotten slightly confused on how the crystallization process exactly occurs when preparing a supersaturated solution. Say we prepare a supersaturated solution by the usual process, first ...
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637 views

How can we tell the particle size of solutes in solutions?

This is a general question in regard to solutes dissolving into solvents. I am interested in the reality of the particle size of the solute during dissolution. For example, take $\ce{NaCl}$ and ...
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What is the causing my solution to precipitate?

I have a solution that contains M9 Minimal Media 5X, Glucose, Magnesium Sulfate, Calcium Chloride and L-Phenylalanine. When the solution is pH'd to 8.5 with 4M Sodium Hydroxide, it starts to ...
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General rules to predict solubility in water [closed]

We were taught these rules to predict the order of solubility in general cases. This is the theory we were taught: Case1) When number of cations is greater than number of anions, ...
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1answer
6k views

Solubility of Aluminium Hydroxide in Sodium Hydroxide Solution

Aluminium hydroxide is not soluble in water at all, however I was doing some reading and read that it does in fact dissolve in a solution of sodium hydroxide. This just seemed a bit strange to me, so ...
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1answer
487 views

Does Ksp depend on the solvent?

E.g. would the solubility and Ksp of $\ce{Mg(OH)2}$ be the same in water as it would be in HCl? Doesn't solubility depend on the polarity of the solute and solvent, so wouldn't different amounts of a ...
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1answer
32 views

At what point does decreasing solvent temperature cause a decrease in gas solubility?

Example: At constant pressure, carbon dioxide becomes less soluble in water as temperature increases. We also know that carbon dioxide becomes more soluble in water as temperature decreases. Does ...
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313 views

Trend in solubility of carbonates

I recently read an article on the solubility of carbonates of Group 1and Group 2 elements. It said that the solubility of Group1 carbonates increases on moving down the group while that of Group 2 ...
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149 views

Need a malleable solid which dissolves in HCl, acetone, or water

I need to temporarily plug the end of a 3 mm ID copper tube with some sort of malleable solid solute that I can dissolve at later point by flushing with a solvent/acid via syringe. I need to keep the ...
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How to determine concentration limits of a buffer that's limited by solubility?

I need to maintain a certain range of % of ionisation from a buffer. For e.g. Histidine buffer. When making high concentration of this buffer at (say) pH 7.2, 25'C, [concentration] is limited to 75mM ...
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1answer
1k views

Dissolution of Pentahydrate of Copper Sulfate

I'm having some difficulty understanding how the pentahydrate of copper sulfate dissolves in water. I understand how polar molecules work, and how things dissolve in water, but I can't get my head ...
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Solubility of potassium nitrate and potassium chloride

Why more water is needed to dissolve potassium chloride than potassium nitrate of equal amount? Is it to do with the reaction that occurs when the compounds dissolve or the properties of the compounds?...
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281 views

Why is there an increasing solubility in water for chlorides, chlorates, perchlorates in that order?

According to Wikipedia $\pu{100 mL}$ of water dissolve at $\pu{25 ^\circ{}C}$ about $\pu{35 g}$ of $\ce{NaCl}$ (1), but about $\pu{79 g}$ of $\ce{NaClO3}$ (2), and around $\pu{210 g}$ for $\ce{NaClO4}$...
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1answer
798 views

Why isn't Indigo soluble in water?

Why isn't Indigo soluble in water? I mean, it has 2 H-N groups, shouldn't it then be able to hydrogen bond with water?
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512 views

Will water allow salts to be dissolved in methanol (that are otherwise poorly soluble)?

If we make a mixture of water, methanol and a salt like $\ce{FeCl2}$, $\ce{NaCl}$ etc, will the ability of water and methanol to mix allow $\ce{FeCl2}$ and $\ce{NaCl}$ to be a part of this mixture and ...
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Finding ions in water samples

So for a school chemistry assignment I was given 5 water samples and a bunch of different reagents to help me find out what was in the solutions. I'm stuck on two. The first one had a pH of 7 and ...
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2answers
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What is solubility of silver oxide in NaOH and KOH [closed]

What is solubility of silver oxides ($\ce{AgO}$ and $\ce{Ag2O}$) in $\ce{NaOH}$ and $\ce{KOH}$? How much of silver oxide can dissolve in 1 liter of $\ce{NaOH}$ or $\ce{KOH}$?
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438 views

Will the solubility of a solute increase over the time a solute dissolve?

would like to ask about a question that I came across in one of my assessment books. Appreciate the help that I can get. Qns: In an investigation, two substances X and Y of the same mass are ...
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1answer
732 views

Baking soda + oil solubility

I have a question regarding the solubility of baking soda (bicarb soda) in oil. I am pretty sure that it has poor solubility, but I have a chemistry dilemma and cannot seem to solve it. I make all-...
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1answer
50 views

Does the addition of acid change alkalinity? [closed]

I'm attempting to speed up the dissolution of calcium carbonate by the addition of hydrochloric acid. However, I'm using the calcium carbonate as a source of carbonate for a water sample. But would ...
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2answers
667 views

How can I filter dissolved PVA from water

I'm working with a 3D printer that uses PVA filament as a support material. After a 3D printed part is made, it is put in water for some time to dissolve away the PVA supports. I'm trying to speed ...
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1answer
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Is it possible for a compound to be soluble in a mixture of solvents but not the individual solvents?

Some weeks ago one of my friend needed to use turpentine. As a good but ignorant chemist on that point I did some research about it. I found (at the beginning) in the French wikipedia page of ...
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2answers
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Solubility curve for uranium hexafluoride (in any solvent)

I am doing a project and need a solubility curve or at least solubility data for uranium hexafluoride in any substance. It is impossible for water because $\ce{UF6}$ reacts violently with $\ce{H2O}$. ...
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1answer
3k views

Solvent for recrystallization of benzoic acid?

Which is best solvent for recrystallization of benzoic acid? Water $\ce{CH3Cl}$ $\ce{CCl3COOH}$ $\pu{0.1 M}\ \ce{NaOH}$ I understand the solute/solvent should be soluble at ...
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Pressure increase due to the reaction of CaO and HNO3

Currently I'm facing difficulties in determining the pressure increase due to the reaction between $\ce{CaO}$ and $\ce{HNO3}$. To be more specific, we first fill a vessel with $\ce{H2O}$ and $\ce{CaO}$...
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1answer
214 views

Formation of MnO2 vs [Mn(H2O)6]4+ in aqueous solution

I am looking for reasons why $\ce{Mn(IV)}$ wouldn't be stable as a hydrate. I know that from standard reduction potentials it exists as a ppt of $\ce{MnO2}$, but what is stopping it from being a ...
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2answers
254 views

Solubility and equilibrium

Is equilibrium between dissolution and recrystallization of a salt in an aqueous solution reached only when the solution is saturated; or can this also be established in an unsaturated solution? Will ...
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1answer
329 views

What's the relationship between supersaturation and temperature?

In gravimetric analysis, what does supersaturation mean? And, how is it achieved by lowering the temperature, even though increasing the temperature makes a higher number of solute particles more ...
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3answers
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Will this reaction form magnesium carbonate?

I have magnesium oxide pills I take. I know if I dissolve them they'll form magnesium hydroxide, and I'm trying to make pure magnesium from my pills. I've come up with a double replacement reaction, ...
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1answer
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I'm trying to verify the integrity of my cheap “24k gold” leaf

In what acid would a combination of gold and copper only dissolve the copper, but leave the gold? I've been googling around, and so far they follow very close to the same solubility rules - as in, it ...
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2answers
3k views

Why is sodium carbonate less soluble in water than sodium bicarbonate?

Why is sodium carbonate less soluble in water than sodium bicarbonate? If you think about their structures, the only thing that is different is that sodium carbonate has two sodium atoms, while sodium ...
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1answer
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Adding ethanol to louche

I'm watching MIT chemistry by Donald Sadoway. In one of his lectures devoted to solutions and phase separation, he performs experiments with absinthe. First he mixes absinthe with 5 $\times$ water ...
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590 views

Does solubility of acetic acid depend on the pH?

Does the solubility of acetic acid increase or decrease in water if I adjust the pH? Conversely, a water-insoluble molecule (like retinol), can its solubility be increased by adjustment of the pH? I ...
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2answers
8k views

How do we know which compounds have higher solubility? [closed]

Is there any way we can look at the chemical formula of various compounds, do some calculations or something and figure out which compounds will have higher solubility as compared to the others.
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Which of these functional groups is soluble in aqueous HCl and/or NaOH?

http://pastpapers.papacambridge.com/view.php?id=Cambridge%20International%20Examinations%20%28CIE%29/AS%20and%20A%20Level/Chemistry%20%289701%29/2015%20Jun/9701_s15_qp_42.pdf I need some help to ...
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2answers
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Is lithium bicarbonate an aqueous solution of lithium carbonate?

This question is related to: Are Lithium bicarbonate and​ Magnesium bicarbonate both soluble in water? What type of chemical reaction is this? How can bromine water be called a solution? In the ...
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1answer
199 views

Why is Cyanidine soluble in water?

Cyanidine is not polar due to its make-up of only hydrogen atoms and carbon atoms, correct? But "like dissolve like", which means it would HAVE to be polar, or no? Is it then soluble solely because of ...
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1answer
127 views

If A reacts with B (aq), does that mean it is soluble in it?

For example, ethanol is soluble in water, but doesn't react with it. On the other hand, H2SO4 is said to be soluble because it dissociates (reacts) in water. Would ethanol be soluble in HCl (aq)? It ...
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Solubility of Aluminium Halides by Fajans rule

According to Fajan's rule polarizability of anion is directly related to the size and hence the covalent character would be more. Now going by this definition aluminium chloride having greater ...
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Are esters and amides soluble in cold acids/bases? [closed]

The main problem I have is that we say amines are soluble in acids because they are bases, and they will thus react with acids. But if A reacts with B, how does that imply A is soluble in B? Yes, ...
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367 views

Does “soluble in alcohol” imply ethanol?

Sources like Wikipedia and SolubilityOfThings say that copper (II) acetate is soluble in alcohol. Does that mean any alcohol, or does "alcohol" in this context mean ethanol?
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What is the molarity of a solution made by dissolving 25.63 grams of naphthalene (MM = 128.17g) in 250.0 grams of benzene? [closed]

I don't really understand how to find the amount of liters with benzene in order to find the molarity.
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1answer
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Is Mg(OH)2 more insoluble than MgCO3?

In removing temporary hardness by boiling, $\ce{Mg(HCO3)}$ is converted to $\ce{Mg(OH)2}$ but not $\ce{Mg(CO3)}$. The answer that I found in our coursebook was that it has a higher solubility product, ...
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2answers
124 views

What exactly is a solubility product, and what is its use?

What exactly is a solubility product, and what is its use? I've come across this term while reading, and don't have access to anyone who can help me understand this concept.
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2answers
396 views

Super-saturated solutions

If a solution is super-saturated is it possible to add a substance to it without allowing it to crystallise? Does a change in temperature have to happen and reduce it's saturation if I want to add ...
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Can other substances be dissolved in a saturated solution?

If I have a liter of water fully saturated with sucrose would it be possible to dissolve something like salt or any other substance in the water? Or when the solution is saturated, is it impossible to ...
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3answers
3k views

Are lithium bicarbonate and magnesium bicarbonate both soluble in water?

Are lithium bicarbonate and​ magnesium bicarbonate both soluble in water? Source: JEE Mains 2017 (National Level Examination of India) Please do cite a reputed source along with your answer. ...
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2answers
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Definition of “soluble” [closed]

How to define "soluble" in chemistry? For example, in 1:1 v/v, benzene does not mix with water, i.e. insoluble. Common sense. However, in an analytical procedure, it called for making a "saturated" ...
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1answer
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Is there a free online resource where I can get the solubility of a solute in a solvent?

I'm looking for a online resource that lets me find the solubility at of any solute (e.g Choline Chloride, Sodium Hydroxide, Dextrose) in any solvent (e.g. Ethylene Glycol, Oleic Acid, Isopropanol, ...
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1answer
183 views

How to determine the amount of barium in a sample of contaminated water?

Here is the assignment I have: You are working for Matrix Pro - a company involved in analytical assessment and method development for the clean-up of contaminated waters. You received water ...