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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590 views

Conversion of units for concentration: mol/l to ppm

The concentration of an aqueous solution of $\ce{Mg(SO4)2}$ is $0.001\, \textrm{mol} \cdot \textrm{dm}^{-3}$. Find out the concentration of solution and the concentation of $\ce{Mg^{2+}}$ ion in ppm....
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1answer
238 views

Determining Fluorescence Quantum Yield of C60 in Toluene

For my experiment, I am trying to determine the fluorescence quantum yield of C60-fullerene in toluene (at room temperature). In order to do that, I need to have a standard sample with a valid and ...
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2answers
360 views

Calculating concentration of an ionic compound

$n$ liters of $k$ M $\ce{NaCl}$ are poured into $m$ liters of $l$ M $\ce{NaCl}$. Determine $\ce{[NaCl]}$, $\ce{[Na^+]}$, and $\ce{[Cl^{-}]}$.
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Two chemistry inquiries [closed]

Here is my second question, I know 1000 grams of water is 1 liter. But does the density affect the result? What if the substance is mercury? When you add seed crystal in to a supersaturated solution, ...
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What is the carbon dioxide content of a soda can or bottle?

I sort of know how carbonated beverages are carbonated: a lot of $\ce{CO2}$ gets pushed into the liquid, and the container is sealed. There are at least two things I don't know. First, how much carbon ...
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Why is the melting point of p-dichlorobenzene higher than those of o-dichlorobenzene and m-dichlorobenzene?

I was going through alkyl and aryl halides and noted the following statement in my textbook: p-dichlorobenzene has higher melting point and solubility than those of o-dichlorobenzene and m-...
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Insoluble Group I/ammonium salts

Most solubility references (e.g. this one) say that there are "few" insoluble salts of alkali metals. Are there any exceptions?
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Does supersaturated caffeine polymerize?

I tried preparing a supersaturated solution of caffeine by mixing anhydrous caffeine powder with water in a thin Turkish tea glass and heating it up over a candle (desperate times...). This worked ...
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Why do solutions become saturated?

Why can a solvent dissolve only a particular amount of solute? If we add more solute to the solution, the number of solute particles in contact with water increases. So rate of dissolution should ...
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15k views

Substance whose solubility increases with decrease in temprature

Is there any chemical substance, whose solubility increases with decrease in temperature ?
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2answers
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Can two precipitates form in a precipitation reaction that starts with only two compounds in water? [closed]

Can two precipitates form in a precipitation reaction that starts with only two compounds in water?
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Solubility, pressure and Henry's law

Determine the solubility of $\ce{N2}$ in water exposed to air at $\pu{25^\circ C}$, if the atmospheric pressure is $\pu{1.2 atm}$, assume that the mole fraction of nitrogen is $0.78$ in air and the ...
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Is tea powder better dissolved when put in hot water?

I usually make tea by adding two spoons of tea powder to water at room temp. and start to heat it. My friend said it will be better to add the powder once the water starts boiling. She said that it ...
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1answer
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why are Ca(OH)₂ and Al(OH)₃ less soluble than Na(OH) in water

Even though it has more $\ce{OH}$ groups and still it is very weak in terms of dissolving? please clarify to me in terms of polar and non polar solubility, how to determine whether a compound is ...
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980 views

Solutions, solvents and solutes

In all the chemistry books and eBooks it says that "like dissolves like"... but when it comes to some molecules like ether, cellulose, vitamin A and $\ce{CO_2}$, it confuses me. If we take ether, it ...
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2answers
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How to liquefy or extract water from superabsorbent polymer

I am finding a good way to liquefy or extract water from superabsorbent polymer. From what I remember it was salt that can liquefy it. Since salt when dissolve will have sodium cation and there for ...
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1answer
458 views

Dyes that can stain oil and water

Is there such a thing as a dye that can stain both oil and water? In other words, does anyone know of an amphiphilic dye? Maybe a surfactant that is also a pretty shade of blue? Or maybe turn one ...
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Calculating Standard Gibbs Energy of Dissolution

The solubility of mercury (I) iodide is $\mathrm{5.5\ fmol/L}$ in water at $25\ \mathrm{^\circ C}$. What is the standard Gibbs energy of dissolution of the salt? The reaction is $$\ce{Hg2I2(s) -&...
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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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1answer
439 views

How can I avoid crystallisation of sugars in vinegar at low temperatures?

I produce high density balsamic vinegar, when it's winter and the temperatures are very low, high density products tends to crystallize. think this is a problem of over saturation of the glucose. The ...
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1answer
3k views

Best consumption-safe liquid for caffeine solubility?

The question is simple: What human-consumption safe liquid has the best caffeine solubility? It's 200mg/10mL of water. That's a lot of water for one dose! I found some ramblings on a fourm stating ...
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2answers
700 views

Imiscible fluids for demonstration

I have been considering building a fluid dynamics demonstration. Basically, it would be a thin plexiglass box, with some turbulence inducing elements attached to the back face, and a pump to move the ...
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Why are NaCl and NaBr not soluble, whereas NaI is soluble in acetone (in the Finkelstein reaction)?

My book states that: Finkelstein reaction is particularly useful for preparing iodoalkanes. The iodoalkanes are obtained by heating chloro or bromoalkanes with a concentrated solution of sodium ...
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How to calculate molality, molarity and mole fraction given density (g/mole)?

Calculate the molality, molarity and mole fraction of a $\ce{CuSO4}$ in a 17% m/m aqueous solution (density of the solution is 1.367 g/mole) I did .17 * 1.367 to find grams of $\ce{CuSO4}$ and .83 * ...
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1answer
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How do I calculate the cell voltage using the following half-reactions and solubility products?

The concentrations of $\ce{NaCl}$ and $\ce{KI}$ are at $\pu{0.120 M}$ and $\pu{0.090 M}$, respectively, in the following electrochemical cell: $$\ce{Cu_{(s)}|CuI_{(s)}|I^{–}_{(aq)}||Cl^{–}_{(aq)}| ...
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1answer
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Absolute limits on solubility of immiscible solutes?

I know that for a particular, immiscible solute, there is a limit on how much of it can be dissolved in a solvent at a given temperature. However, I was wondering if there is only so much "total ...
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Is H2CO3 (carbonic acid) soluble or insoluble in water?

I am asking this because I know that acids are normally aqueous but according to the solubility rules, all carbonates are insoluble.
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Which silver halide is the most soluble?

Halides are group 7 elements. They generally have a low melting and boiling point. They are highly reactive. Silver chloride and silver bromide are not soluble in water. So they will be precipitates. ...
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395 views

Thermodynamics behind Deliquescence?

The phenomenon of deliquescence wherein a water soluble substance absorbs water from atmosphere and dissolve in it forming a saturated solution, has thermodynamic roots. I have read the fact that the ...
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Why do salts such as NaCl dissolve?

If we look at solubility of salts in water, we are told that they disassociate, because the positive $\ce{Na}$ ion is attracted to the partially negative oxygen in water and the negative $\ce{Cl}$ is ...
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Is Mn(C₂H₃O₂)₂ soluble in water? [closed]

Also, can you explain why, as in which solubility rules apply in this case?
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Making a saturated solution of Na₂CO₃

I need to make a saturated solution of $\ce{Na2CO3}$ and according to the available data I should add $22\ \text{g}$ in $100\ \text{ml}$ of water at $25\ ^\circ\text{C}$. I wanted to make $300\ \...
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Ksp of Manganese Phosphate

I can't find the $K_{sp}$ value for Manganese Phosphate ($\ce{Mn_3(PO_4)_2}$) anywhere online. Has it been measured? What is it?
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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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How to determine the order of boiling points and solubilities for (chloro-)alkanes, ethers, aldehydes, and alcohols?

How to determine the order of boiling points and solubilities for (chloro-)alkanes, ethers, aldehydes, and alcohols? What rules can be applied to make these choices? Take for example the following ...
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Why is heating increasing the solubility of sodium hydroxide?

\begin{align} \ce{NaOH &-> Na+ + OH-} & \Delta H^\circ &= \pu{-44.51 kJ/mol} \end{align} The dissolution of sodium hydroxide in water is an exothermic process, and so, according to Le ...
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Changes in physical properties in homologous series : Solubility

In the text that I'm reading it is stated that : As the molecular mass increases in any homologous series, a gradation in physical properties is seen. This is because the melting points and boiling ...
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Solubility of Calcium Fluoride in water

$\ce{CaF2}$ is insoluble in water, but $\ce{CaCl2}$, $\ce{CaBr2}$, $\ce{CaI2}$ are soluble. Why is this so?
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Solubility of compounds in water

Why is $\ce{NaCl}$ more soluble in water than $\ce{NaOH}$? Well, this is a question from Chemical Equilibrium and the question hints for explanation in terms of Le Chatelier's principle.
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Influence of solubility on the complexation constants at different pH values

Given some small chemical compounds whose solubility varies with pH, and in the case of compounds that can form complexes, I have seen that the complexation constant varies with pH. I think there ...
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How to determine which gas is more soluble

I have a chemistry homework problem that asks whether $Br_2$ or $O_2$ is more soluble in water in room temperature. However, I can't seem to find a way to figure it out, short of looking it up. Is ...
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Prediction of solubility (from chemical structure) at different pHs [closed]

I would like to know What is the best method for predicting the water solubility (and in other solvents) of a compound given its molecular structure at different pHs. What I know now is based on the ...
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Are pesticides used on fruit easily washed off?

I was hoping there'd be someone who studies pesticides here. Are they water soluble? Do they get absorbed in to the fruit? How well would you have to wash the fruit to fully remove the residue?
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Is it possible to estimate a substance's water solubility from data like the substance's partition coefficient, dissociation constants, etc.?

If it is possible, how would you estimate a compound's water solubility from data like its partition coefficient, $ \log P $, its dissociation constant, $pK_a $, its molar mass, etc.?
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Can magnesium chloride absorb water and ammonia at the same time?

Anhydrous magnesium chloride will absorb ammonia to the tune of ($\ce{Mg(NH3)6Cl2}$). Incidentally, magnesium chloride is usually a hexahydrate ($\ce{MgCl2(H2O)6}$) at STP. My question is, could ...
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Why is my NaCl solution seemingly saturated, when I followed the recipe for an isotonic solution?

I prepared an isotonic solution of table salt in water following this recipe: 1 leveled coffee spoon of salt in 0,5L of water. 9g/L would be an isotonic solution, a leveled coffee spoon is commonly ...
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How to calculate the solubility of CaF2 at different temperatures?

At $\pu{25^\circ C}$ I used the free energy table for $G$ for the reaction and got $K_\mathrm{sp}= 10^{-9.02}$. I now need to find out what the solubility is at $10$, $20$ and $\pu{30^\circ C}$. ...
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Understanding dissolution of CO₂ in Selexol and Rectisol

I'm trying to understand pre-combusiton carbon capture processes as described in this presentation. I'm told that solvents such as chilled methanol ($\ce{CH3OH}$) and dimethyl ethers of ...
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Methane seems to dissolve more readily in cold water. Why?

When you are diluting air in the system and/or properly evacuating it, you must consider water temperature. Methane is completely dissolved in water at 42 degrees Fahrenheit (5.5 C) but can be ...
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Are words on my T-shirt removable? [closed]

I wonder if the words on my T-shirt are removable? If yes, what kind of (chemical or physical) ways are there? They look like paints on the cloth, as the letter "C" has become blurred in the way ...