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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Caffeine dissolution
I am looking to add caffeine powder in pure form to water that has a pH level of 7 or higher. What would the pH level be if I do this? Is Caffeine itself acidic?
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Are all strong bases alkalis?
In my text book, it says that strong bases are alkalis because they fully dissociate in aqueous solution. But I'm not too sure of this. Can you not have a weak alkali? And can you not have a strong ...
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What solvent dissolves calcium nitrate but not ammonium nitrate?
I am experimenting with a precipitation reaction between ammonium sulfate solution and calcium nitrate. Calcium sulfate precipitates and can be filtered out easily.
I am wondering if there's a way I ...
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Solubility of a tribasic weak acid
I have a question that reads:
$\ce{H3A}$ is a tribasic acid. The three deprotonations can be written as
$\ce{H3A <=>[pKa1 = 2.9] H2A- <=>[pKa2 = 4.2] HA^{2-} <=>[pKa3 = 5.2] ...
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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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What governs the merging of globs of inmiscible liquid?
If I add a small amount of chloroform to a bunch of water, it falls to the bottom as a glob.
If I shake the container vigorously (being carefully not to spill any of the dangerous substance!), the ...
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Which is more soluble in water and why: K₂HPO₄ or CaHPO₄?
If I dissolve $\ce{K_2HPO_4}$ and $\ce{CaHPO_4}$ in water (two different reactions), the latter shows better solubility. Is it because $\ce{Ca^{2+}}$ has ha higher valence of $2$ than $\ce{K^+}$, ...
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Reducing temperature on dissolved Pb(NO3)2
I have pretty much zero experience in chemistry whatsoever but I wonder about how much crystal will I get from fully dissolved element when I reduce water temperature.
Variables
at $\mathrm{40^\circ ...
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Why is benzene more soluble than chlorobenzene in water?
Wikipedia lists chlorobenzene's solubility in water at 0.5 g/L at 20C, and benzene's at 1.79 g/L in 15C and 1.84g/L at 30C.
Chlorobenzene is very slightly polar, shouldn't it be more soluble? What ...
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Are Group 2 metal fluoride salts less soluble in organic solvents than Group 1 fluorides?
It is clear that Group 1 metal fluoride salts DO NOT readily form solutions in organic medium. The amount of solvation that can occur leading to the eventual release of a fluoride ion depends on many ...
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Finding equilibrium constant from solubility product constant
Given
$$\ce{CuI(s) <=> Cu+(aq) + I-(aq)}\, ;\qquad K_\mathrm{sp} = 1.2 \cdot 10^{-12}$$
write a reasonable chemical reaction that describes the decomposition of $\ce{CuI2}$ in aqueous ...
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A problem in solubility of salts with multistep hydrolysis of an ion possible
Calculate the solubility of $\ce{MnS}$ in pure water, $K_\mathrm{sp}(\ce{MnS}) = \pu{2.5e-10}$. Assume hydrolysis of $\ce{S^2-}$ ion. $K_1$ and $K_2$ for $\ce{H2S}$ are $10^{-7}$ and $10^{-14}$, ...
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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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Differences between miscible and soluble
What are the differences between soluble and miscible? So far I found this (page 3 http://faculty.sites.uci.edu/chem1l/files/2011/03/D01MANmiscibility.pdf):
soluble=solid dissolves into a liquid
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Hydrophilic vs water soluble?
Is the term 'hydrophilic' a synonym of 'water soluble' or can you have a molecule that is water insoluble but hydrophilic (or water soluble and not hydrophilic)?
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Why does ozone have such a large solubility in water?
At $25~\mathrm{^\circ C}$, the solubility of ozone is $109~\mathrm{mg~L^{-1}}$. This is $13$ times higher than the solubility of diatomic oxygen. What causes this?
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Miscibility of pairwise miscible liquids
If you have a mixture of 3 (or more) liquids which are "pairwise miscible", but which don't react with each other, does that guarantee that the mixture will only have one layer?
By "pairwise miscible"...
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Which metal hydroxides are soluble?
Alkali metals (Li, Na, K, Rb, Cs) and the alkaline earth metals (Ca, Sr, Ba - sometimes Mg is included also) form hydroxides that are well-known to be soluble or at least slightly soluble and create ...
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Why do exothermic dissolution reactions occur?
I've always been taught that an exothermic dissolution means that the forming of solute-solvent bonds releases more energy than the energy consumed to break solute-solute bonds and solvent-solvent ...
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Can all water soluble ionic compounds conduct electricity?
I'm taking a first year university chemistry course, and I am reading a lot of contradicting things. Some people say that ionic compounds that are soluble in water are always electrically conductive, ...
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What factors cause a few sodium salts to be water-insoluble?
We know that almost all salts with sodium as cation are water-soluble. But there are a few examples where the salt is water-insoluble; such as sodium bismuthate, sodium fluorosilicate, and much more.
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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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How to prevent sedimentation of an EDTA suspension?
I tried to create a suspension of EDTA powder in glycerin with 1:1 ratio. I keep facing problem of EDTA sedimentation. I've tried other ratios also but this was the only one which formed least amount ...
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Mixing cobalt(III) hydroxide and thallium(III) hydroxide
A simple question on solutions is driving me crazy. At this point, I think the textbook's wrong. Here's the question:
A saturated solution of cobalt(III) hydroxide $(K_\mathrm{sp} = \pu{1.6e-44})$ ...
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Solubility of Iodine in Some Organic Solvents
The solubilities of iodine in $\ce{CCl4,n-Hex,Et2O,PhCH3}$ were given respectively as 19 g/kg, 13 g/kg, 337 g/kg, and 182 g/kg. These results puzzle me for the following reasons:
1) Iodine, being a ...
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Why zinc sulphate solubility is higher in ethylene glycol than water?
I'm trying to find saturation point for dissolved zinc sulphate in water and ethylene glycol.
Based on my knowledge, water is more polar than ethylene glycol as reflected in its higher dielectric ...
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Iodometric titration of copper – standard electrode potentials
Upon inspection of the standard electrode potentials for the half reactions for both $\ce{Cu^2+}$/$\ce{Cu+}$ and $\ce{I2}$/$\ce{2I-}$, it becomes apparent it should be the iodide ions that act as the ...
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Does solubility matter when measuring density with displacement method?
Can the volume of a solid (specifically a granular crystal or powder) be accurately determined using the displacement method with a liquid in which the solid is soluble?
Originally I thought by ...
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How is Raoult's law a special case of Henry's law and not vice versa?
I know that Raoult's law can be a special case of Henry's law when the value of the Henry's constant becomes equal to the vapour pressure of the pure state of the liquid. Why can't we say the opposite,...
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Solubility of oxygen in water with temperature, why does the change in solubility decrease around 40 °C?
Better set in context using a graph:
The solubility seems to fall quite persistently from 0 °C to 30 °C, then gradually slowing down in fall, then dropping faster and faster from 80 °C. Why does that ...
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Carbon Dioxide Solubility in Water
I did a lab where I tested the solubility of carbon dioxide in water at different temperatures. I took 50 mL of carbonated water at different temperatures and then I titrated that with sodium ...
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Density and solubility
Do all saturated solutions have the same density? Based on your data, which salt is more soluble?
\begin{align}
&\ce{NaCl} & \pu{11.812 g/10 mL} \quad &\text{or} \quad \pu{1.181 g/...
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Are bisulfates and bicarbonates soluble in water?
Generally, are bisulfates and bicarbonates soluble in water?
Specifically, are calcium hydrogen carbonate and magnesium hydrogen carbonate soluble in water?
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How to determine which salt will precipitate from a solution containing multiple ions?
I have a solution containing $0.2\:\mathrm{mol}$ of $\ce{Br^-}$ ions and $\ce{SO_4^2-}$ ions each.
Now if I add excess $\ce{AgNO3}$ in this solution,
what will precipitate?
$\ce{Ag2SO4}$ or $\ce{...
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Solvent for copper(I) iodide, copper(I) thiocyanate, silver iodide for HTM deposition; safety for methylammonium lead iodide
I'm a student working in a high school laboratory that is looking to pursue research into perovskite cells for next year, but I have some solubility and safety questions.
What would be a good solvent ...
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Why Ionic compounds dissolve into water
First, I would like to say that I understand the basic idea of disassociation and solubility. However, as I study intermolecular forces I feel like this basic Idea is being challenged. My ...
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Can you carbonate a non aqueous liquid?
We have a home carbonator for makeing seltzer. It blows $\ce{CO2}$ under high pressure into water. Could I use it to carbonate corn oil? Is $\ce{CO2}$ soluble in a no aqueous solution?
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Does brewing tea with hard water reduce the amount of bioavailable fluorine?
I read that brewed tea contains a relatively large concentration of Fluorine.
Fluorine can have negative health effects such as Skeletal Fluorosis. EDIT: I understand some Fluorine is necessary and ...
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Is carbon dioxide soluble in petroleum ether, and why?
I googled it, and I'm finding some forum posts that say no, but no authoritative reference.
CO2 is somewhat soluble in water (1.7 g/L at 20°C) and I understand that it's mostly NOT because it forms ...
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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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Solubility vs Dissociation of HF
Ok, so I understand that solubility is a measure of how well a compound is solvated by the solvent. And dissociation is a measure of how much of a compound splits into its ionized forms.
Does HF have ...
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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 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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Dielectric constant for gases possessing van der Waals forces [closed]
I've learnt that water can dissolve ionic bonds because it possesses a high dielectric constant.
In the cases of covalent compounds (especially the non-polar covalent compounds), where the molecules ...
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Why is potassium bitartrate so insoluble?
The solubility of potassium bitartrate in water at 20°C is given by Wikipedia as 0.57 g per 100 ml, which is considerably lower than that of sodium bitartrate. Generally, a potassium salt is more ...
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Theory of volume contraction in solution
When a solid is dissolved into a liquid, or two solids are amalgamated, their mutual volume will contract. For example, a crystal of sugar having a volume of one cubic inch dissolved into 10 cubic ...
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Brewing tea with deionized water
I am wondering what efect brewing tea (let us assume for the sake of simplicity it is green tea, brewed at about 80 °C) in deionized water might have on the product.
Will the lack of ions in the ...
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How to break down soap and detergents?
I am building a greywater harvesting system. It is a 3-stage system:
The 1st stage breaks down soap and detergents.
The 2nd stage filters the water.
The 3rd stage pumps water out of system.
What ...
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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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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 of bonding? What makes a compound soluble in some solvent and not in some ...