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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163 views

Is NaCl the only precipitate when you add HCl to concentrated NaCl [closed]

When aqueous HCl is added to a saturated salt water solution, is NaCl the only precipitate or does some HCl crystalize as well? Sources online say that NaCl crystallizes but they don't say what ...
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34 views

Effect of temperature on concentration of ammonia in trichloromethane

By reviewing some literature on the distribution of ammonia in water and trichloromethane, I've found that increasing temperature decreases the partition coefficient of ammonia given that the formula ...
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53 views

How to take a sample of a hot salt solution without it precipitating in the cooler glassware due to the difference in solubilities at different temps?

I'm doing an investigation to see the effect of temperature on the solubility product of strontium hydroxide. I made a supersaturated solution left in the oven overnight at 85°C for equilibrium to be ...
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Techniques to extract lipids

I am planning an experiment on how to isolate casein and part of the process involves removing any lipids that may still be in it after filtering the precipitated casein out of the milk. I have read ...
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Is honey really a supersaturated solution? Does heating to un-crystalize redissolve it or melt it?

In the SciShow video Honey: Bacteria's Worst Enemy after about 00:30 the narrator says: Honey is only about 17% water. Most, but not all of what remains is sugar....
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Is the analyte included in the ionic strength equation?

I don't quite understand the calculation for ionic strength of a solution. The formula includes the concentration and charges of the ions in solution, however, is the analyte (whatever we're trying to ...
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1answer
48 views

Hardened polyurethane remover

I've looked at the MSDS of a couple of products for removing hardened polyurethane (PU) foam. Both contained only ethanolamine as a dangerous substance, but only between 1-5%. So I'm guessing this ...
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2answers
127 views

Determination of solubility equilibrium using galvanic cell reactions

This is the problem: We can determine the solubility equilibrium for silver bromide using cell: Ag (s) | AgNO3 (aq) || KBr (aq) | AgBr (s) | Ag (s) We know that: $\text{AgBr} + \text{e}^- \...
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Q. 36 2018 molar solubility of CaF2 at pH3 given molar solubility at pH7 and pKa of HF [closed]

This is Q36 on the 2018 Chemistry Olympiad: Calcium fluoride, $\ce{CaF2}$, has a molar solubility of $\pu{2.1e–4 mol L–1}$ at pH = 7.00. By what factor does its molar solubility increase in a ...
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how can I predict the rate of water ions precipitation on a surface?

Consider a titanium pot that contains 1kg water with the following ions: $[Ca^{2+}]=22000$ ppm, $[Mg^{2+}]=1500$ ppm,$[Sr^{2+}]=791$ ppm,$[Na^{1+}]=48000$ ppm,$[Cl^{1-}]=120000$ ppm,$[SO_4^{2-}]=...
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127 views

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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132 views

Is it possible to dissolve Raspberry ketone in warm water?

I poured a small amount of RK in cold water and it clumped together so I warmed it in the microwave and it disappeared in the water meaning it dissolved, but i was under the assumption that RK is ...
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346 views

why is methane gas solubility in water higher than carbon monoxide solubility in water?

The above graph depicts solubility in water at various temps. If we are dissolving in polar water, why is methane more soluble than a polar molecule like carbon monoxide?
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667 views

Calculating solubility of iron(III) hydroxide in water

The following example in Skoog's Analytical Chemistry uses mass-balance and charge-balance equations to calculate the solubility of iron(III) hydroxide in aqueous solution. $$ \begin{align} \ce{Fe(...
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103 views

Solubility of solids in liquids

How does crystallisation happen and why? I have been told that when a solid is dissolved in a liquid solvent, an equilibrium is set up between processes of dissolution and crystallisation. But if ...
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1answer
148 views

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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1answer
159 views

Solubility of dimethyl ether in aliphatic hydrocarbons

I'm having trouble finding information on the solubility of dimethyl ether in a hydrocarbon like butane, propane, or isobutane. I've read that its soluble in methanol, ethanol, isoproanol, ...
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1answer
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In search of a safe and inexpensive solvent that can dissolve depolymerized polypropylene waste plastic

I work at a place where we depolymerize post consumer waste polypropylene waste plastic through a thermal catalytic conversion process. During process shutdown we have to clear up the vessels which ...
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2answers
107 views

Solubility of lead cyanide

I read that lead(II) iodide is soluble in excess KI solution due to complexation, but lead(II) cyanide does not dissolve in excess cyanide solution. This seems wrong since cyanide is a much better ...
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1answer
739 views

Solubility of Potassium Dichromate in Water

According to Wikipedia, the solubility of Potassium Dichromate increases very significantly with the temperature. At 20°C, 13g/100ml, and at 100°C, 104g/100ml. Therefore, it should be possible to ...
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40 views

What causes the turbidity when preparing Fenton's reagent?

New guy, please be gentle. I might ask questions not according to conventions, I am not a chemist nor do I study chemistry. Feel free to adapt the question and the tagging. I am preparing a solution ...
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1answer
216 views

How does lime prevent soda lime glass from dissolving in water?

How does lime addition as an ingredient prevent soda lime glass from dissolving in water? Does it form calcium silicate in the process of melting?
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Why is Mg(OH)2 sparingly soluble in water but soluble in NH4Cl

Is $\ce{Mg(OH)2}$ sparingly soluble in water because it's hydration enthalpy is not greater than its lattice enthalpy? Also, is it soluble in $\ce{NH4Cl}$ because it is a stronger base than $\ce{NH4(...
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1answer
26 views

Can I have a homogeneous 2 molal solution of copper(II) sulfate at 20 °C?

I'm doing a high school chem project where I am making a calibration curve of copper(II) sulfate for spectrophotometry in which I make solutions with five different concentrations. The most ...
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94 views

Why are hydrogen-bonded compounds (such as NH3) excellent solvents for most lab reagents? [closed]

Hydrogen bonds are said to be one of the strongest molecular interactions in nature. Then why can most substances that interact through hydrogen bondig such as water and $\ce{NH3}$ able to dissolve a ...
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1answer
739 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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270 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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1answer
125 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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1answer
102 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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26 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
507 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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189 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
3k views

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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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
602 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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1answer
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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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
41 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
53 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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1answer
216 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
442 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
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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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335 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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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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246 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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205 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
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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 ...