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

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3
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1answer
324 views

Are all strong bases alkalis?

In my text book, it says that strong bases are alkalis because they fully dissociate in aqueous solution. But I'm not too sure of this. Can you not have a weak alkali? And can you not have a strong ...
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3answers
112 views

Can all water soluble ionic compounds conduct electricity?

I'm taking a first yer chemistry course at University, i am reading alot of contradicting things. Some people say that ionic compounds that are soluble in water are ALWAYS electrically conductive, ...
4
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2answers
177 views

Solubility of Noble Gases

I read this statement that " Xenon is the most soluble noble gas in water " . My first doubt is , Why does the solubility of noble gases in water increase down the group ? Even if this is the ...
6
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2answers
49 views

Can Liquid CO₂ dissolve plastic

I know that subcritical and supercritical $\ce{CO2}$ are excellent solvents. I've seen some examples of plastics being damaged by the $\ce{CO2}$ being impregnated into the plastic at very high ...
3
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1answer
43 views

Why is acetone and diethyl ether miscible, but not water and diethyl ether?

Acetone and Water are miscible, and water and diethyl ether are not. So why are acetone and diethyl ether miscible if water and acetone seem to have similar polarities?
3
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2answers
53 views

What is hard and soft water and how does the process of dissolution work?

This is a very basic question about solubility, especially solution of table salt in water and solution of sugar in water. I have heard about terms like hard water, soft water, filtering of water to ...
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2answers
51 views

Are Na and Cl ions from NaCl in water separate charged particles?

Suppose I pour some sodium chlorine into water. So, what happens is that NaCl(s) → Na+(aq) + Cl-(aq) meaning that the ionic bond between Na and Cl breaks up (correct this far?) Now, does this mean ...
2
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2answers
34 views

Why does (atmospheric) pressure have an effect on solubility?

The Wikipedia article titled Solubility table states that The table below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with ...
1
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1answer
38 views

Gold salt solution?

I was wondering what salts of gold are soluble and which are insoluble. From what I understand, silver is soluble as silver nitrate but insoluble as most other common salts like chlorides and ...
1
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1answer
19 views

How to remove epoxy on clothes?

How to remove epoxy on clothes in the perspective of chemistry? More precisely in my case, how to remove the hardener of epoxy, which consists of two components: hardener and resin. The clothes is ...
2
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1answer
42 views

Should the relatively low solubility of a base be considered in the calculation of the pH?

Hydrochloric acid, $V=75.0~\mathrm{mL}$, $c=0.250~\mathrm{M}$, is added to $225.0~\mathrm{mL}$ of $0.0550~\mathrm{M}$ $\ce{Ba(OH)2}$ solution. What is the concentration of the excess $\ce{H+}$ or ...
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1answer
58 views

Solubility of a Molecule in Different Solutions

Can anyone please confirm my answer. Should it be most soluble when it is the most deprotonated?
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1answer
28 views

Will isopropyl alcohol dissolve the coating/paint of a notebook?

The notebook is a Dell Inspiron 6400 and the coating/paint is the silver on the palmrest and back cover. It says 99,4% on the container of the isopropyl alcohol.
3
votes
1answer
79 views

What is a strong base?

How come that some insoluble compounds in water, e.g. $\ce{Mg(OH)2}$, $\ce{Ca(OH)2}$, $\ce{Sr(OH)2}$ are considered strong bases? Are they even strong bases? How can I tell if a compound is a strong ...
3
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0answers
60 views

UV curable adhesive

I'm looking for a UV curable adhesive that can be removed without peeling or burning. Ideal removal would be some kind of solvent over a relatively short period of time. I also need it to have a ...
1
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1answer
51 views

Iodometric titration of copper - standard electrode potentials

Upon inspection of the standard electrode potentials for the half reactions for both $\ce{Cu^2+}$/$\ce{Cu+}$ and $\ce{I2}$/$\ce{2I-}$, it becomes apparent it should be the iodide ions that act as the ...
0
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3answers
113 views

What does CH4 form when dissolved in aqeous solution?

So I understand $\ce{CH4}$ has a low solubility, but when it does dissolve, what does it form? E.g. $\ce{HCl_{(g)} + H2O -> H3O+_{(aq)} + Cl^{-}_{(aq)}}$. So what does $\ce{CH4 + H2O}$ form? Thank ...
0
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1answer
38 views

How could you dissolve a coating of CaCO3(s) from a metal plate?

A metal plate has an unwanted coating of $\ce{CaCO3(s)}$. You must find a way to clean this metal plate without causing any scratches or abrasion. How might you dissolve the coating? I know I ...
2
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1answer
24 views

Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion in a saturated solution?

Solutions are prepared by dissolving a sulphate salt in water. Which one of the compounds listed would we use in order to get the highest concentration of sulphate ion, SO42-, in a saturated ...
3
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2answers
221 views

Is it possible to have Volume(solution) < Volume(solvent) + Volume(solute)?

I recall seeing chemistry demonstrations where a significant amount of a solute is dissolved in a solvent and the solution volume barely changes. Questions regarding this: 1) How is this possible? ...
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2answers
56 views

Separating gold and silver from gold foil using hydrochloric acid and hydrogen peroxide

I used $\ce{HCl}$ and $\ce{H2O2}$ to recover gold foils by dissolving all other metals. My solution I assume contains a large amount of silver. How do I drop the silver out of the $\ce{HCl}$ and ...
0
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1answer
24 views

Equilibrium Constant of a Salt knowing the solubility

Calculate the equilibrium constant in $\ce\\M ^ 3$ of the heterogeneous system in aqueous solution: $\ce{CaF2 \leftrightarrows Ca^{2+} + 2F-}$ Knowing that the solubility of the salt is $15.9 ...
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2answers
47 views

How can an insoluble compound be a strong electrolyte

Here's a quote from Petrruci General Chemistry (pg. 160): Silver chloride, $\ce{AgCl}$ is an insoluble ionic compound. When $\ce{AgCl}$ dissolved in water, it is 100% dissociated into ...
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2answers
70 views

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
25 views

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 ...
1
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1answer
29 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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0answers
80 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 ...
1
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1answer
22 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 ...
3
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1answer
62 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
63 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 ...
2
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1answer
43 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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1answer
75 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
40 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, ...
7
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1answer
75 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
711 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 ...
0
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1answer
231 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
188 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 ...
2
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3answers
2k 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 ...
4
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6answers
6k 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
votes
1answer
261 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
192 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 ...
11
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2answers
722 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
121 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
52 views

What are the uses of a mixture of chloroform and N₂ gas? [on hold]

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?
2
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3answers
93 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 ...
0
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2answers
88 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
42 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
22 views

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
51 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. $\ce{2AgOH -> Ag2O + H2O}$ $~~~~~~~~~pK_{decomposition}= 2.875$ ...