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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310 views

Treating a sample with water, how to deduce present compounds given precipitate and solution parameters?

A sample consists of one or more of the following salts: $\ce{Cu(CH3CO2)2}$ (acetate), $\ce{BaCl2}$, $\ce{(NH4)2SO4}$, $\ce{SrCO3}$, $\ce{KNO3}$. The sample, when treated with water, gives a white ...
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1k views

Explanation for solubility of group 2 halides [closed]

I understand that the solubility (in terms of moles/volume) of group 2 halides increase with increase in anion size, i.e. $$\ce{MF2 < MCl2 < MBr2 < MI2},$$ where $\ce{M = Mg, Ca, Sr, Ba},\...
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Effect on solubility by dissolution of other substance (no common ion)

In one of our recent classes on mass and momentum transfer, we studied qualitatively how blood drug concentrations vary after consuming a tablet containing that drug. We considered the following: ...
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Can someone explain me the difference in boiling point of water when I add: KBr; CaCl2; AlCl3?

I have noticed (during an experiment) that the boiling point of the solutions created by H2O+KBr; H2O+CaCl2 and H2O+AlCl3 see their boiling point increase. During the experiment, I thought that, ...
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349 views

Reverse reaction of acid dissociation [closed]

Consider an acid HA with Ka 10^-10 dissociating into its ions as HA⇌H+ +A- My question is-if we introduce solution of pH=3(let's say any weak acid or a buffer) and put ions of A- of 0.1M into it (...
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Solubility of Alkali Metal Chlorides

Why does Potassium Chloride less soluble than Sodium Chloride in water, isn't it supposed to be other way round? Since Potassium Chloride would be more ionic than Sodium Chloride?
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Why does like dissolve like?

Polar solvents love polar solutes to be dissolved in it and non polar with non polar. Often said as like dissolves like. Okay, polar loving polar can be understood with help of the facts: same polar ...
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chemical possibility in oil - 8th graders have questions for a project

I have a team of kids (8th graders) that are doing the First Lego League competition this year. As part of that they have to come up with a possible solution to a problem that relates to the human ...
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Solubility experiment of different organic compounds [closed]

Chemistry lab note says that:1) Aromatic acids like benzoic acid and salicylic acid are NOT soluble in water. But they are soluble in 5% NaOH, and 5% NaHCO3. Due to having a large hydrcarbon part (...
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Simultaneous solubility of CaF2 and SrF2

Solubility of two electrolytes having common ion when they are dissolved in solution is called simultaneous solubility. How do I calculate the simultaneous solubility of the above mentioned salts ...
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How do salts of a weak acid + weak base behave in solution?

Say you have Ammonium Formate in solution, the salt formed by the reaction of Formic Acid and Ammonia. Would both the Formate ion and Ammonium ion protonate and deprotonate, respectively, to form ...
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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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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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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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160 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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54 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
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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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393 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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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
125 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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70 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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355 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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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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10k 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
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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
35 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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183 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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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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527 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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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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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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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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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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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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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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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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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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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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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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407 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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399 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
468 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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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, ...