For questions related to the solubility of compounds in various solvents, especially in water.

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Why is water a poor solvent for organic molecules?

Few organic molecules dissolve in water but why is this the case?
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0answers
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I need to identify a substance

It is flat, brittle, greyish/teal colored and is white in the inside (broke with scopula.) It has a low melting point (melts into a clear liquid with the dye concentrating on the bottom) but cools ...
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1answer
21 views

What other factors can make a compound dissolve into water?

I am doing some homework just right now, and I encountered this problem. I know that the polarity of the water molecules allows them to be a solvent for a variety of polar species or even species ...
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1answer
42 views

Why do some solid chemicals dissolve better in colder water?

I just discovered that some solid chemicals, such as $\ce{Na2SO4}$, dissolve better in cold water than hot water from here and would like to know if there is any particular reason as to why. Is it ...
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1answer
20 views

Why is a reaction more favorable if one of the products is not soluble/sparingly soluble?

I have heard people go so far as to say that the "driving force" of a reaction is the formation of the precipitate. Why is this so? Whilst the process is almost certainly exothermic (I think - please ...
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1answer
58 views

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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2answers
32 views

Polarity of amino acids

If I understand correctly, solubility of organic compounds depends mainly on the presence of polar groups plus putting in the factor of the number of carbon atoms in the molecule. So putting that in ...
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1answer
25 views

Which chemicals could be used to dissolve Polybutylene Terephthalate (PBT), but not dissolve brass?

This is for a recycling project, I am looking to recover brass pins from electronic connectors made of glass reinforced Polybutylene Terephthalate (PBT). The objective is to find a chemical which ...
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0answers
30 views

Is glycerol/glycerin soluble in ethanol?

As titled, I wish to know if glycerol/glycerin is soluble in ethanol (not soluble, slightly soluble, very soluble)
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1answer
31 views

Why can't saliva clean “stickiness”?

Why is it that when you consume something that is sugary-sticky (like candy, chocolate, fruit juice, etc.) and get it on your skin, when you try to clean it off with saliva (particularly, ...
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1answer
67 views

Caclulating the Solubility of Fluorite in River Water

I am attempting to work through problems in Chapter 4 of Brunlow's 1979 Geochemistry text. The question is "Calculate the solubility of fluorite in river water with the average composition given in ...
3
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2answers
610 views

What chemical substance is obtained by dissolving C60 in olive oil?

What chemical substance/component would be obtained of dissolving Carbon-60 in olive oil? Would buckminsterfullerene (bucky-ball) change its spherical fullerene structure (a soccer ball) into ...
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1answer
129 views

Why has lithium bromide a slight solubility in organic solvents?

Why has lithium bromide a slight solubility in organic solvents? Theoretical, LiBr is an ionic compounds, so it should be only soluble in polar solvent like water. But why is it soluble in others?
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4answers
2k views

Why is sand that insoluble?

Why is sand that insoluble? Sand is a polar molecule but does not dissolve in water. Is it because of the big structure that sand makes?
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3answers
90 views

How do you explain pKa to non professional?

Let's say we have substance A which was mixed with substance B to improve shelf-life because pKa of the substance A is 7.9 and in mix the pH is 5.2. Does this mean that in the solution with pH near 8 ...
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2answers
258 views

How to dissolve candle wax (parafin)?

Wikipedia states, that waxes can be dissolved by non-polar organic solvents. But I failed to disolve candle wax in both acetone and ethanol, which are the only organic solvents I have at home. I have ...
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4answers
3k views

Why doesn't calcium carbonate dissolve in water even though it is an ionic compound?

I studied the solubility of compounds in water. I have found that calcium carbonate doesn't dissolve in water. The teacher stated that the ionic compounds dissolve in water except some carbonates. ...
2
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1answer
123 views

Does solubility matter when measuring density with displacement method?

I thought I understood this, but I'm having some doubts now. My question is quite simple: Can the volume of a solid (specifically a granular crystal or powder) be accurately determined using the ...
2
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3answers
143 views

What to do about a un-dissolved substance?

To exterminate a coackroach infestation, I bought solid boric acid (in powder form). Rather than awaiting the cockroaches' encounter with the boric acid, I thought about spraying boric acid onto ...
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2answers
440 views

When I dissolve sugar in my cup of tea/coffee, does it become a liquid or gas, or neither?

When I dissolve sugar in my cup of tea/coffee, does the sugar go from being a solid to being a liquid or a gas, or neither? Related: What keeps the sugar suspended in the tea?
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1answer
89 views

How can I presume what dissolves what?

Regarding solvents, the only thing I remember from school is my teacher saying: "The same dissolves the same." regarding the polar/non-polar solvents. From this I understand that water is polar ...
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0answers
36 views

What are the uses of a mixture of chloroform and N2 gas?

What are the uses of a mixture of chloroform and $\ce{N2}$ gas? Also, what are the uses of a mixture of camphor and $\ce{N2}$ gas?
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3answers
72 views

Why won't increasing the temperature increase the solubility of a gas in a liquid solvent?

If I raise the temperature of a solution of a gas in a liquid solvent, why won't the solubility increase? Increasing the pressure will increase the solubility, but increasing the pressure doesn't ...
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2answers
71 views

How to calculate the solubility product for PbS from galvanic potential?

Knowing that at 25°C the following galvanic cell: $$\ce{Pb~|~Pb(NO_3)_2~1M~||~PbS~saturated~|~Pb}$$ shows an $\mathrm{EMF} =0,413~\mathrm{V}$, find the $K_{sp}$ of $\ce{PbS}$. My Approach This ...
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0answers
32 views

Does CO2 dissolution in different salt concentrations affects the amount of carbonic acid formed?

We have a school experiment, where I must report on the following question: Does salinity affect the solubility of $\ce{CO2}$ in saltwater? So we selected four different concentrations of salt ...
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0answers
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How to produce hot water-soluble soap balls? What is their chemical background? What about medical capsules?

There are water-soluble balls for soap baths. Then there are medical capsules that disappear in mouth. Is it possible do this kind of capsules and water-soluble containers at home? If not, what do I ...
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0answers
48 views

Why don't plus one oxidation state metals form stable complexes with hydroxide ion?

For example, why doesn't AgOH exist as a stable compound? I read that it rapidly decomposes to silver oxide and water. $\ce{2AgOH -> Ag2O + H2O}$ $~~~~~~~~~pK_{decomposition}= 2.875$ ...
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2answers
241 views

Ionic compounds dissolve in nonpolar compounds?

I think ionic compounds dissolve in just about any compound including nonpolar. My reasoning is this: Neutral electric charge attracts both positive and negative(This I know from doing things with ...
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1answer
30 views

What is the Solubility of Common Noble Gases in Concentrated Phosphoric Acid, 85% w/v?

By Henry's Law, the concentration of a dissolving gas in a liquid is proportional to the partial pressure of that gas in contact with the liquid , mathematically, $ p = k_H c$, where $p$ is the ...
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1answer
164 views

What is the reason for the different solubility of silver halides in ammonia?

According to my knowledge, I know that $\ce{AgCl}$ dissolves in dilute ammonia, $\ce{AgBr}$ dissolves in concentrated ammonia and $\ce{AgI}$ does not dissolve even with concentrated ammonia. What is ...
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1answer
35 views

Can one reduce solubility of NaCl by adding CO2 under pressure? Will the salt fall out of solution?

One can salt CO2 out of solution by adding salt to carbonated water. Can one do the reverse? If one adds more and more CO2 to the water under pressure, can you drive out the salt?
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3answers
1k views

If CO2 is nonpolar how come much more dissolves in water than O2?

Why is it that $\ce{CO2}$ is considerably more soluble in water than $\ce{O2}$ is? $\ce{CO2}$ is nonpolar but dissolves in water which like $\ce{CO2}$ being nonpolar, doesn't make any sense. Is it ...
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3answers
43 views

What does the hydrolysis of a salt tell us about its basic/acidic character?

I'm curious to know how basicity and acidity arises when a salt or covalent compound is dissolved in water.
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1answer
47 views

Calculating the molar mass of a solute from freezing point

A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. The solution freezes at -1.23C. Calculate the molar mass of the solute. Kf for water = 1.86C/m. My steps: 1.23=1.86 * x/1.05 ...
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1answer
71 views

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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1answer
86 views

What is the difference between a bond, force, and interaction?

I am trying to explain why some solids are more soluble in water than others: So the energy released from the formation of bonds between the solid solute molecules and water molecules compensate the ...
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1answer
194 views

Is there a readily available liquid that's more dense than water and insoluble?

I am looking for any liquid that does not dissolve in water with higher density and does not react with water, one that is readily available.
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1answer
123 views

Removing prenylated phenolics from clothing, shoes, and upholstery

I live in Southern California and sometimes hike in areas that can be overgrown with a plant called purple poodle-dog bush. As I found out the first time I went crashing through a stand of the stuff, ...
1
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3answers
79 views

Finding the initial concentration

The solubility product of $\ce{AgBr}$ is $7.7 \cdot 10^{-13}\:\mathrm{mol^2/L^2}$. What was the initial concentration of $\ce{AgNO3}$ solution, if the precipitation of $\ce{AgBr}$ appears after the ...
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1answer
770 views

Why does the solubility of Group II hydroxides increase and the solubility of sulphates decrease down the group?

I know that, solubility of alkaline earth metal hydroxides increases down the group and solubility of alkaline earth metal sulfates decreases down the group. Would you please explain me the reason ...
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1answer
368 views

Solubility of p-nitrophenol in various substances?

So I had an organic chemistry lab where we had to dissolve p-nitrophenol in water, dilute $\ce{NaHCO3}$, dilute $\ce{NaOH}$, and dilute $\ce{HCl}$ to test for solubility. The p-nitrophenol dissolved ...
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1answer
525 views

How much carbonation is in one liter of commercial fountain coke-cola

From what I understand generally coke is carbonated to roughly 6.2g per liter in bottles and cans, or 3.1 volumes of CO2. I was watching this video because I was curious about how fountain soda ...
2
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1answer
81 views

Memorising exceptions for soluble salts

My daughter has a chemistry exam on Tuesday. She is doing quite well with her revision except for the following table which she is having difficulty remembering. Does anyone know of an easy way to ...
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1answer
162 views

Why are many silver salts insoluble?

For example, silver chloride, silver sulfide, and silver oxide are three exceedingly stable silver salts in water solution. Why is it that silver forms such stable salts? Does this have to do with ...
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1answer
30 views

Is there a good sol gel method for carbon nanotube thin film deposition?

I was searching for a sol gel method for deposition of carbon nanotube thin films and there aren't too many articles on that. Does anybody know the reason? Is it because Carbon nanotubes are ...
3
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1answer
145 views

CuI, CuSCN Solubility in Ammonia Solution

I am trying to dissolve copper(I) iodide and copper(I) thiocyanate in ammonia. I am quite sure that they both dissolve in liquid ammonia, and are insoluble in ethanol. If I were to purchase a 2.0M ...
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1answer
76 views

Permanent suspension of cocoa powder into water

I have failed in permanently suspending cocoa powder into water. I have tried heat (212'f) and pressure (40 psi) into a sugar water solution (50/50). Also, powdered milk and evaporated milk have ...
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0answers
48 views

Galvanic Element: Silver Iodide and Standard Hydrogen cell

I have to calculate the $\mathrm{p}\ce{H}$ of the $\ce{H+}$ solution with the following info: $\ce{Ag(s) | AgI(s) || H2(g)(1atm) | H+(aq) (X mol/L) | Pt(s)}$ $E=0.1\:\mathrm{V}$ Temperature ...
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1answer
238 views

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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1answer
32 views

A sample of tap water is found to be 0.025 M in Ca2+. If 105 mg of Na2SO4 is added to 100.0 mL of the tap water, will any CaSO4 precipitate?

Given: Ksp of CaSO4 is 7.10*10^-5 Molar mass of Na2SO4 is 142.04g/mol My Attempt: Step 1 - figure out molar solubility of CaSO4 √7.10*10^-5 = 8.43*10^-3M Step 2 - convert Na2SO4 from mass ...