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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Identifying the solubility of Polyvinyl Alcohol (PVA) in water versus temperature

Background: Poly Vinyl Alchohol (PVA) is a plastic used for a sacrificial support material for 3D printing and sewing. This material is used specifically because it is water soluble, and can be ...
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Are there any common powders that dissolve in oil?

For a nice visual effect, I want to increase the density of an oil (baby oil, in particular), so I have some control over how it behaves in relation to water. If I had to do the same for water, I'd ...
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Why do gases generally dissolve better in cold water, while solids dissolve better in hot water? [closed]

I have noticed this since I was a little kid, yet have never come across a satisfactory answer....
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Why is Amphotericin B insoluble in water in the pH range that makes it zwitterionic?

Here is the structure of Amphotericin B, with its carboxylic acid and amine groups circled in red: According to this source, The carboxylic acid group has a pKa of 5.5 and the amine group has a pKa ...
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Solubility and covalent character [closed]

We have heard many times that this XYZ solute is soluble in this ABC solvent. But what does being soluble in mean in terms on bonding? What makes a compound soluble in some solvent and not in some ...
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Can I dissolve IBA from talc powder?

My container of in total 25 grams of rooting powder contains 2.5 mg IBA (Indole-3-butyric acid), which is mixed with talc powder and a tiny bit of chromium(III)oxide. I know talc is not soluble in ...
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Why Potassium Bicarbonate has a higher solubility than Sodium Bicarbonate?

SODIUM BICARBONATE SOLUBILITY Wiki POTASSIUM BICARBONATE SOLUBILITY wiki As According to this answer Now, note that the hydride ion is "hard", having high negative charge density. While ...
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If I have an oil that contains an impurity that's more soluble in water than in oil, is there a way to "wash out" the impurity with water?

Maybe this question is better classified as "physics" than chemistry, but I'm trying it here. Suppose I'm concerned about a substance S that is highly soluble in water and less soluble in ...
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Why does CO2 have a greater affinity for hemoglobin than oxygen?

I know about CO but I am wondering if CO2 has similar mechanism? do you guys have any scientific reference These species help form interactions between amino-acid residues at the interfaces of the ...
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How do I get calcium citrate to precipitate in experiment on extraction of citric acid from juice?

I was planning to extract citric acid from mango juice by first using Aspergillus niger fungus by fermentation to convert the mango juice to citric acid, then extracting by first adding sodium ...
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Solubility of Sodium Chloride [duplicate]

I have come to know that, the lattice energy of NaCl is 788 KJ/mol and hydration energy of NaCl is 784 KJ/mol.We know,if lattice energy> hydration energy,the compound won't dissolve.But how is NaCl ...
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Solubility of lead(II,IV) oxide

I was solving a question: Which of the following liberate $\ce{O2}$ upon hydrolysis? $\ce{Pb3O4}$ $\ce{KO2}$ $\ce{Na2O2}$ $\ce{Li2O2}$ The answer is no doubt $\ce{KO2}$ but if I am not wrong $\ce{...
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Finding solubility of salts of polyprotic acids

Problem Given, for $\ce{H3PO4}$, $\mathrm{pK_\mathrm{a_1}=2.2}$ $\mathrm{pK_\mathrm{a_2}=7.2}$ $\mathrm{pK_\mathrm{a_3}=12.4}$ For the salt $\ce{Mg(NH4)PO4}$, $\mathrm{pK_\mathrm{sp}=12.6}$ and the ...
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Why doesn't limestone layer on house walls (now dust) flow off when it rains due to dissolved carbon dioxide?

What happens to the limestone layer formed on house walls after whitewashing? Why does it not flow off when it rains, as rainwater contains $\ce{CO2}$? That will covert $\ce{CaCO3}$ into calcium ...
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What is "super triple phosphate" and is it soluble or not?

I have been working on some detergent formulations and some specifications call for "super triple phosphate". The problem is that the formulations generally require all the inputs to be ...
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Predicting the solubility of sulfate salts [duplicate]

I came across a problem that asks to predict the solubility of alkaline earth metal sulfates: Magnesium, calcium, strontium and barium sulfates. I know that the spontaneity of dissolving can be ...
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Miscibility gap of heptane-methanol mixture

To explain my question a bit better: I added heptane and methanol together in equal ratios (1:1) and observed a separation in phase where there appeared to be an oily layer sitting on top of the other ...
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How are cyclodextrins used to form inclusion complexes with drug molecules?

I'm talking about practical application. A cyclodextrin molecule hosts a drug molecule inside of it in order to increase solubility and stability of the drug. But how do we make sure this inclusion ...
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What makes an electrolyte strong - solubility or dissociation? [duplicate]

I'm having some confusion related to the terms mentioned in the title. Suppose we have a strong electrolyte but with a very low solubility. Therefore a given amount of it will not be able to produce ...
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Units conversion of Henry coefficient in adsorption on solids [closed]

In a database of solid microporous materials I have the Henry coefficient in units of $\pu{mol kg^{-1} Pa^{-1}}.$ How to convert to $\pu{Pa^{-1}}?$ I tried to multiply by the molar mass of the sorbate ...
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Effect of inert gas blanket on oxygen solubilized in wine

If applied to a volume of wine, could a blanket of argon become dense enough to remove oxygen from the wine? This is not a question of sparging the wine. Rather, could a blanket of argon over the top ...
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Relation between common ion effect and the temperature of the solution [closed]

Adding extra Na+ in a saturated NaCl/water solution decreases the solubility of NaCl. How does this exactly happen? AFAIK, the solubility of a solid only decreases with the temperature of the solution....
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Dominant factors rendering very low solubility of large aromatic molecules

In terms of structural basis, alkanes are insoluble or immiscible in water because of such presence of C–H...O interactions that are in regime of van der Waals interaction, which tends to be regarded ...
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How to dissolve brass surrounded by aluminium?

I have a broken off brass needle stuck in a caste aluminum hole. (It’s the pilot mixture jet on a carburetor). I was wondering if there was a chemical that would dissolve the brass while not reacting ...
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What happens to water and oxygen produced due to dissociation of nitric acid? [closed]

Nitric acid is yellow in colour due to the dissolution of nitrogen dioxide gas. The nitrogen dioxide is obtained due to thermal dissociation of a portion of nitric acid: $$\ce{4HNO3 -> 2H2O + 4NO2 +...
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Out of tropolone and tropone, which is more soluble in water?

According to me tropolone has intramolecular H-bonding, so extent of H-bonding with water will decrease and thus, will be less soluble. Tropone (Cyclohepta-2,4,6-trien-1-one): Tropolone (2-...
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Why is it advised to use neutral ferric chloride solution while performing confirmatory test for acetate ions? [duplicate]

The reaction of $\ce{FeCl3}$ with $\ce{CH3COO-}$ is $$\ce{3Fe^{+3} +6CH3COO- +H2O<=> [Fe3(OH)2(CH3COO)6]^{+} +2H^{+}}$$ Recently I read that a solution of $\ce{FeCl3}$ hydrolyses very quickly to ...
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344 views

What is the solubility trend of alkaline earth metal fluorides?

I was going through JD Lee and I found certain contradictory statements. First: With most compounds, on descending the group, the hydration energy decreases more rapidly than the lattice energy: ...
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diprotonated vs monoprotonated inorganic phosphate

We have made confounding observations in the physiology lab working with inorganic phosphate. The cell processes we study rely upon the transport of diprotonated inorganic phosphate. But we get ...
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Which method has the highest yield of calcium sulfate?

I'm not sure which of following two methods will give better yields for $\ce{CaSO4}$: A. Add dilute $\ce{HNO3}$ to $\ce{CaCO3}$, followed by dilute $\ce{H2SO4}$; or B. Titrate aqeuous calcium ...
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Solubility of trimethylsilyl fluoride in water?

I was wondering about the solubility of the byproduct of deprotecting silyl ethers (ex. Me3SiF) with fluoride (ex. TBAF). I couldn't find anything online and I was wondering if precipitation occurs in ...
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Why does iodine stay in the aqueous layer of a hexane/salt water mixture?

All the procedures take place in test tubes. There is also stirring in each case. $\ce{NaCl}$ and $\ce{I2}$ are simultaneously added to a water solution. Then we add hexane. There is no reaction ...
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314 views

Why are entries missing on a solubility data chart for ionic compounds? [closed]

There is a solubility chart in my college chemistry class text for "Solubility of Ionic compounds in water". I have copied and pasted image of chart below. I was surprised to find a dozen ...
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Does adding NH3 to an HCl solution facilitate the dissolution of aluminum compounds?

If we compare the two solutions hereafter, which one would better leach/dissolve aluminum metal/compounds present at/near the inner surface of the glass: Solution A: $10\,\%\, \ce{HCl + H2O}$ Solution ...
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Appropriate ways to remove aluminum from the surface of glass?

I'm looking for a way to treat the surface of borosilicate glassware such that it won't contaminate solutions of puriss reagents in conditions that pure $\ce{SiO2}$ wouldn't, yet keep the bulk ...
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Why does the dissolution of calcium hydroxide have a negative entropy?

We had an experiment on the dissolution of calcium hydroxide and we obtained the experimental entropy value $\pu{-203 J mol^-1 K^-1}$ with a percent error of $26.7\%.$ Doesn't dissolving a solid in a ...
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Qualitative analysis of the anionic part of a salt using it's soda extract [closed]

While testing for anions using dilute $\ce{H2SO4}$, we prefer using the soda extract for tests rather than the actual salt. But we don’t use it for tests of carbonates, bicarbonates and sulphites. Why ...
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What does it mean to "shear" an emulsion?

The following instructions are given for a preparation and I am wondering what it means to "shear an emulsion"? The water phase components and the oil phase components are each mixed in ...
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Trial by fire: Safely heating sand without it agglomerating?

Wikipidia quotes a melting point of 1713C for sand. I went on the beach to get some sand. I assume it's a mix of all kinds of stuff. The finality is to prepare a big pile of clean sand to use as ...
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Salt solubility and solvent dissociation

A textbook, describing a qualitative test for the $\ce{Al^3+}$ cation in which you use $\ce{NH4Cl}$ and $\ce{NH4OH}$ to precipitate $\ce{Al(OH)3}$, mentioned that the solubility of this precipitate ...
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Why is Maleic Acid more soluble in water than its trans isomer Fumaric Acid?

My teacher taught me that compounds having intramolecular H-Bonding are relatively less soluble in water as they will not involve in H-Bonding with water appreciably while those able to do ...
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Ddetermining dissolution in solvents

In recent chemistry class , I learnt that like dissolves like I was told following points- Ionic solutes are highly soluble in polar solvents like water, ammonia etc. Reason: The ion-dipole ...
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SrSO4 Solubility in Acid

$\ce{SrSO4}$ is insoluble in water. Will it be more soluble in an acid solution? I know that if the anion is the conjugate base of a weak acid, it'll be more soluble. Does $\ce{SO4^2-}$ count as the ...
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Dissolution of CO2 in water

The following question has troubled me for a while. For gases that are slightly soluble in water, there is a proportional relationship between the partial pressure, $P$, and the mole fraction, $x$, ...
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Can more than 1 mol of gas dissolve in 1 mol of H2O?

$\pu{1176 mL}$ of ammonia can dissolve in $\pu{1 mL}$ of water at $\pu{0℃, 1 atm}$, according to wikipedia. Equivalently, about $\pu{0.94 mol}$ of $\ce{NH3}$ dissolve in $\pu{1 mol}$ of $\ce{H2O}$. I ...
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61 views

How to make silicic acid, potassium silicate or calcium silicate?

I am a student of tropical agriculture. I am taking the class of agronomic chemistry and plant nutrition. I want to make use of silicate source I have at home for e.g. zeolite, wood ashes, ...
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64 views

Is ionisation an equilibrium process?

I read in a page that ionisation is an irreversible process. But, as equilibrium is always reversible would that mean equilibrium does not involve ionisation process. And than dissociation is a ...
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39 views

Why is only mole fraction used in Henry's law and not some other measure of concentration?

Why is some other quantity like molality or molarity used? I understand why mass percentage cannot be used as it is difficult to measure mass of gas... Now is mole fraction used because solubility is ...
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53 views

Solubility of Beryllium Compounds in Water [duplicate]

Why is $\ce{BeF2}$ is highly soluble in water but $\ce{Be(OH)2}$ is insoluble? Both release $\ce{Be^{2+}}$ ion so this means they both have high hydration enthalpies and can easily overcome their ...
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How to use Sodium Thiosulfate for fixing dicopper (I) tetraiodomercurate (II)?

DISCLAIMER DO NOT TRY TO DEMERCURATE USING DESCRIBED PROCEDURE. CONSULT YOUR EMERGENCY SERVICE. I found a discrepancy between a government-approved procedure of living quarters demercuration and the ...

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