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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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Other liquids for collecting gas by displacement method for SO2

I am looking for a low cost method of quantifying gases evolved from a reaction. The gas mixture is expected to have $\ce{H2}$, $\ce{SO2}$ and $\ce{CO2}$ but likely others too. I am considering using ...
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2answers
452 views

Why does lead(II) acetate does not ionize appreciably?

As this page in this book says, lead(II) acetate is soluble, but does not ionize appreciably. It seems contradictory to me, since, to call a substance soluble means it has high $K_\mathrm{sp}$ (when ...
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1answer
2k views

Why is chitin ordinarily insoluble in water, but soluble after deacetylation? [closed]

Chitin is usually insoluble in water. How does its chemical structure explain this? Furthermore, when chitin undergoes deacetylation, it becomes soluble and forms hydrogen bonds with water. How is ...
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0answers
105 views

How can I decrease the Krafft temperature of an hexadecyl sulfate surfactant?

I need to prepare an anionic surfactant from a treatment of cetyl alcohol (hexadecanol) and $\ce{H2SO4}$, and then neutralize it using $\ce{NaOH}$ or $\ce{NH3}$; but sodium hexadecyl sulfate has a ...
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35 views

How can it be determined that a liquid is saturated with a gas?

How can it be determined if a liquid is saturated with a gas? For example, if I am introducing carbon dioxide to water at 40 PSI at 35F in a sealed container, how would I know at what point the water ...
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4answers
3k views

Are there any sodium salts that are insoluble in water?

Are there any sodium salts (e.g. NaCl) that are insoluble in water? If so, what are their approximate $K_\mathrm{sp}$ values?
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1answer
258 views

Which is more likely to form: silver chloride or silver phosphate?

If silver nitrate is added to an aqueous solution (such as tap water) that contains both chloride ions and phosphate ions, which precipitate is more likely to form: silver chloride, silver phosphate ...
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93 views

Solubitity of FeS

I have some questions related to a problem of multiple equilibria and solubility. I have to calculate the solubility of FeS in pure water considering that the second stage of hydrolisis of $\ce{S^2-}$,...
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1answer
108 views

What is the solubility of corundum in water at SATP?

In my textbook called General Chemistry, I could find the solubility of certain substances in water but corundum was not one of them. I've also read some web pages claiming that corundum is insoluble ...
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0answers
53 views

Looking for a low boiling point solvent for MAPI precursors (Lead Iodide (II) and Methylammonium Iodide) [closed]

Things I have thought of till now: Acetonitrile with HI additive Acetonitrile with DMSO additive The problem with the first would be that HI is in an around 55% aqueous solution and water doesn't ...
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0answers
241 views

Why is the formation of lead (II) iodide precipitate favoured over that of the tetraiodo plumbate (II) complex ion in low concentrations of iodide?

I was wondering why $$\ce{Pb2+ + 2I- <=> PbI2}$$ occurs in low $[\ce{I-}]$, however when $[\ce{I-}]$ is in excess, $\ce{PbI4^2-}$ is produced with $$\ce{Pb2+ + 4I- <=> [PbI4]^2-}$$ ...
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What does it mean to say that a strong base is only slightly soluble?

I've often seen the hydroxides of Calcium, Strontium and Barium described as "strong bases that are only slightly soluble," or similar. But strong bases dissociate completely in solution, so I would ...
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2answers
681 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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1answer
100 views

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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0answers
3k views

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
7k 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
595 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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0answers
346 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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2answers
159 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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0answers
42 views

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
2k 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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1answer
3k views

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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2answers
355 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
907 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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1answer
636 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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3answers
77 views

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
872 views

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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3answers
500 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
840 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
735 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
943 views

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
100 views

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
4k 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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0answers
105 views

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
248 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
299 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
359 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
1k views

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
84 views

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
105 views

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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2answers
636 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
10k 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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2k views

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
2k views

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
208 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
132 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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375 views

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 ...