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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805 views

why HI isn't fully miscible with cold water when HF is?

HF is more soluble in water than HI , due to greater hydrogen bonding in HF , accepted but, on the other hand HF is a very weak acid so it's dissociation will be meagre when compared to HI's ...
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Ionic compound having highest solubility in water

Which ionic compound has highest solubility in water? I can find CsBr having highest solubility with 1230 g/L at 25 °C. Note: compounds like ethanol are soluble to any extent in water, but they are ...
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329 views

What explains the stark white colour of my iodometric titration analyte solution?

During my Advanced Higher (secondary school) investigation, I reacted pure copper with concentrated nitric acid to acquire a copper nitrate solution. This was neutralised with excess sodium carbonate ...
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167 views

Is there a Material that is High Heat Resistent and soluble?

What i‘m looking for is any sort of material that dissolves, while being able to resist temperatures of up to 1000°C. And it doesn‘t have to resist during dissolution, only while it‘s solid. And the ...
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122 views

Why does a lowered dielectric constant cause RNA/DNA precipitation in ethanol precipitation?

For ethanol precipitations, as mentioned in https://en.wikipedia.org/wiki/Ethanol_precipitation, given that the attraction of water molecules to charged ions like phosphates is based on Coulombic ...
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0answers
38 views

Why gas solubility decreases with temperature? [duplicate]

I found this quote on a Chemistry LibreTexts website: If the heat given off in the dissolving process is greater than the heat required to break apart the solid, the net dissolving reaction is ...
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1answer
1k views

Oxygen Solubility in Water

This is probably really obvious, but I really don't understand. Why does oxygen dissolve in water when oxygen is a nonpolar molecule and water is a polar molecule? It's obvious that oxygen does ...
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1answer
245 views

What is the solubility of quinine suphate in 98% ethanol?

I have a result from an experiment that really bothers me, yet I found no sources online that can explain the situation. While quinine is relatively soluble in ethanol because they are both non-...
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3answers
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If Mg(OH)2 is insoluble, why does the reaction of MgO and water produce a slightly alkali solution? [closed]

The equation of the reaction is: Mg(OH)2 + H2O -> Mg(OH)2. Why is it that this reaction produces a solution of around pH 9? There are no OH- ions produced.
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3answers
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molar solubility of CaF2 at pH3 given molar solubility at pH7 and pKa of HF

Here was my attempt #$1$ at a solution. $K_{sp}=[Ca^{2+}][F^-]^2$ Using the information at pH=7, I estimated that $K_{sp}\approx3.7\cdot10^{-11}$, which means that barely any HF formed. I assumed ...
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1answer
689 views

Calculating molar solubility of calcium hydroxide from solubility product

On the Wikipedia page for calcium hydroxide, the stated solubility product for $\ce{Ca(OH)2}$ is $K_\text{sp} = \pu{5.5 * 10^{-6} M^3}$. It doesn't stipulate the temperature, but I have a chemistry ...
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25 views

Fishes and Heater

I had an aquarium for about an year and this week my mum just installed a heater in it. On asking, she told me that fishes would die in cold water. But from Henry's Law, isn't it that more oxygen ...
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29 views

Insoluble Nitrate salts? [duplicate]

Are there any Nitrate salts that are generally insoluble in water at room temperature? Textbooks are generally vague about this. They say that all nitrate salts are mostly soluble in water, or that ...
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1answer
46 views

Regarding acid-base reactions, how does one know when a hydrophobic base substance is fully protonated?

When there's a weak base substance (hydrophobic powder), and it needs to be completely protonated by adding an acid (eg: HCl), how does one know when it's completely protonated? Since the powdered ...
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1answer
55 views

Which is more soluble in water ammonia or Sodium dodecyl sulfate

I've tried looking this up and can't seem to find the solubility of SDS if any one knows the answer I would really appreciate it. Which is more soluble in water ammonia or Sodium dodecyl sulfate. ...
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244 views

Advice on forming a 10% solution of Maltol

I’m having great trouble forming a 10% solution of Maltol. Specifically, I’m trying to dissolve 3 grams of Maltol in 27 grams of solvent. I’ve tried everything from Propylene Glycol, to Deionized ...
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1answer
524 views

Insoluble salts and Gibbs free energy

Is it true that according to gibbs free energy equation, insoluble salts such as AgCl don't dissolve because the process would be too endothermic? The right side of the equation, TΔS, would have to be ...
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1answer
2k views

How is silver chloride more soluble in brine than water?

I heard that: Silver chloride is more soluble in very concentrated NaCl solution (brine) than in pure water. Is it true? I mean won't the common ion effect operate? Or may be this is due to some ...
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1answer
497 views

Any consumable liquid that would dissolve ground coffee?

Figured I would try here rather than a food-oriented forum. Is finely ground coffee (Espresso/Turkish) soluble in any consumable liquid? Otherwise asked: is there any liquid available to the average ...
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2k views

Solubility curve for sodium tetraborate in water

What is the solubility curve for sodium tetraborate decahydrate ($\ce{Na2[B4O5(OH)4]·8H2O}$), otherwise known as borax, in water ($\ce{H2O}$)? Additionally, what is the solubility of the ...
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1answer
103 views

carbon dioxide in liquid and gaseous phase with liquid water

What are the differences between carbon dioxide solubility (miscibility, reaction) in liquid water when in gaseous ($\pu{<38 bar}$) and liquid ($>\pu{38 bar}$) phase? The temperature in my ...
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289 views

Dimerisation of HOOC-COOH in non polar solvents

In a textbook I read, the following question is my doubt: Why is the answer B)? Why do the other molecules not dimerise? How does it work? (P.S- Why dosen't the B) option only form hydrogen bonds ...
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244 views

Is it incorrect to say that oil is insoluble in water?

I'm a biology teacher and therefore not a chemistry specialist. When I was a student, my teachers used a mixture of water and olive oil to illustrate the concept of soluble and insoluble substances ...
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1answer
52 views

Predicting products of a reaction and balancing [closed]

2BiOCl + NaOH = BiOH + NaCl. This is the reaction where I am trying to get Bismuth Hydroxide as one product and salt. My problem is what is the state of Bismuth Hydroxide? Whether it is BiOH or Bi (OH)...
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Would boiling distilled water in a kettle full of limescale increase the hardness of the water?

If I had a kettle which had limescale on it (due to several episodes of boiling hard water), and I would use it to boil distilled water, would that mean that some of the precipate dissolve into the ...
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2answers
950 views

Polar compounds that doesn't dissolve in water? [closed]

I'm studying for my exam introduction to chemistry. In the course, there's an exercise where we have to explain why something dissolves in water and why other compounds doesn't. For me, if the ...
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1answer
354 views

The effect of HCL concentration on the Solubility of Hydroxyapatite [closed]

Recently I conducted an experiment to investigate the effect of HCL concentration on the solubility of hydroxyapatite [Ca5(PO4)3(OH)]. This was done by taking a sample of the solution after ...
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1answer
73 views

Does Henry's law depend on curvature of gas/liquid interface?

Could you tell me Henry's law depends on curvature of gas/liquid interface or not? It would be better with references.
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1answer
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Why don't soluble gases that evolve in a reaction remain in solution?

Take for instance the following process: $$\text{2NaCl}_{\ (s)} + \text{H}_2\text{SO}_{4 \ (aq)} \to \text{2HCL}_{\ (g)} + \text{Na}_2\text{SO}_{4 \ (aq)} $$ Why does the evolved gas leave the ...
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28 views

Is every compound that has a H-bond donating group soluble in water? [closed]

I am wondering if there is any general rule of thumb
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2k views

Explain the effect of intramolecular hydrogen bonding on solubilities in cold and hot water?

There is a statement given in my textbook (Cengage, Organic Chemistry (Part 1), page 4.33) which is as follows: (I edited the statement to make it simpler) One can account for the solubilities of ...
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1answer
557 views

Why is propanediol soluble in water?

I'm a crafter who likes to make her own body oils and butters but I have no background in chemistry. Now, I just read something about propanediol (which I'm considering for modifying the feel of my ...
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3answers
307 views

If all intermolecular forces are electrostatic in nature, why don’t large non polar molecule dissolve in water?

If I have a large non-polar substance A that forms strong dipole-induced dipole force (DIDF) with water, with strength comparable to that of H-bonds between water molecules, will A dissolve in water?
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1answer
983 views

Two ways to calculate dissolved oxygen

To calculate the dissolved oxygen in water at saturation pressure at 25 °C, we do: $$ D_\ce{O2} = K_\mathrm{H} \times M \times p_\mathrm{g} $$ $$ D_\ce{O2}~[\pu{g/L}]= 1.26\times10^{-3}~[\pu{mol/L/...
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The effect of pH and solubility on coagulation in water treatment

In water treatment, a specific pH range must be met in order for the process of coagulation to occur properly. Sources have stated this is due to the pH affecting the solubility of the coagulant, but ...
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1answer
149 views

Dependence of mass transfer coefficient on solubility

Does solubility of the solute affect the value of the mass transfer coefficient? The book I am following mentions that the mass transfer coefficient is a characteristic of the constituent and its ...
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1answer
1k views

Dissolving of non polar gases in water (liquid)

How does dissolving happen for non polar gases in water? Is it like being in the space between the water molecules or does there occur some kind of interaction occur between gas molecules and water ...
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1answer
380 views

Why do my equilibrium calculations on this HF/NH4OH buffer system not match those in literature?

I've been trying to reproduce Figure 2 from this research paper (full text available). The Problem However I can't seem to get the same values as in the paper. I did the math both by hand and with ...
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1answer
132 views

What is the solublity of water in liquid carbon dioxide at low temperature?

The solubility of water in liquid carbon dioxide has been investigated by Hosmer W. Stone in 1943 from -29 to about 22 °C. Is there any research done on the solubility of water in liquid $\ce{CO2}$ ...
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1answer
409 views

Reacting NaOH in solution with O3

I use common air to produce ozone. However the gas after the ozone generator does contain $\ce{NO2}$ gas, which I have to remove for the subsequent steps. I tried to remove the $\ce{NO2}$ with a ...
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1answer
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What is the minimum mass of iron(III) chloride required to be added until the dark blue precipitate first appear?

How do I solve this question? The presence of iron(III) ion is confirmed in a qualitative analysis by adding potassium hexacyanoferrate(II) ($\ce{K4[Fe(CN)6]}$) solution. A dark blue ...
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519 views

How to determine if an unknown is potassium chloride or potassium bromate?

In class, we were given unknown substances. I've narrowed the possible substances down to either potassium chloride or potassium bromate. We were given several acids, indicators, and other chemicals (...
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Why do we use different arguments for determining the strength of hydracids and solubility of ionic compounds?

HI is a stronger acid than HF. Why? Because when dissolved in water, the bigger iodide ion handles the negative charge way better than the small fluoride ion. So Iodide ion is a weak conjugate base ...
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1answer
96 views

What's the point of solubility products?

What is the advantage of solubility products, e.g. LiF(s) ⇄ Li+(aq) + F-(aq) | K = [Li+(aq)] * [F-(aq)] = 0.00184 M2 at 25°C (source) compared to just stating that Solubility in water = 0.134 g/...
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effect of overpressure on lowering viscosity of polysaccharide solution

it has been reported that agarose dissolved at 110C under slight over-pressure has a viscosity at least 10X smaller than dissolved at atmospheric pressure at 90C (ref:https://doi.org/10.1016/j....
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What's the identity of the crystalline solid in the following reaction? [closed]

A mixture of toluene, benzoic acid, aniline and phenol was dissolved in diethyl ether and extracted with 5% $\ce{NaHCO3}$ solution? This extract was acidified until a white crystalline compound ...
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Which has a greater dominance: hydration enthalpy or lattice energy?

When I was reading my notes I came up with a problem. I read that for the s block element salts, when checking the solubility, we consider the hydration enthalpy so we decide their stability in water. ...
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1answer
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Why are magnesium chloride and calcium chloride more soluble than sodium chloride?

I read that $\ce{MgCl2}$ and $\ce{CaCl2}$ are more soluble than $\ce{NaCl}$ in water. Solubility of $\ce{MgCl2}$ is $\pu{543 g/L}$ and that of $\ce{NaCl}$ is $\pu{360 g/L}$ (both at $20^{\circ} \pu{C}$...
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If i keep adding sulfuric acid into water, will it keep dissolving forever?

If i keep adding sulfuric acid into water, will it keep dissolving forever?
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Is Biotin water-soluble or fat soluble?

Vitamin $\ce{B_7}$ or Biotin is a member of the vitamin B complex. Members of the vitamin B complex are usually known to be water soluble. However, this webpage mentions that biotin is water soluble. ...

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