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

learn more… | top users | synonyms

5
votes
0answers
22 views

Alkali Metal Rosinates Solubility in Acetone

In violin finishing technology alkali metal Rosinates are used in varnish synthesis. Usually this alkali metal Rosinates are soluble in Turpentine. I also know that Copper, Zinc Rosinates are soluble ...
5
votes
1answer
43 views

How do I predict the solubility of a compound in a mixture of water and an organic co-solvent?

I'm trying to predict the solubility of long alcohols (e.g. 1-octanol, 1-decanol or 1-dodecanol) in a mixture of water and an organic co-solvent such as DMSO, acetonitrile or ethyl acetate. For ...
7
votes
1answer
44 views

Predicting relative solubilites of salts without Ksp values

Is there a way of comparing which salt is more soluble without knowing their $ K_{sp}$ data or performing experiments? For example, comparing $\ce{Hg2Cl2}$ and $\ce{Cr2(SO4)3}$. I am not sure ...
0
votes
1answer
23 views

Purification of water with ferric chloride

Ferric chloride ($\ce{FeCl3}$) is a chemical used in water treatment. If ferric chloride is added to a water sample containing calcium bicarbonate, would the $\mathrm{pH}$ of the solution decrease or ...
4
votes
1answer
30 views

Why are the three most simple alcohols completely miscible?

I want to know why the three most simple alcohols (methanol, ethanol and propanol) are completely miscible in water? I want to know what happens at molecular level. I think hydrogen bonding plays ...
0
votes
2answers
31 views

Identifying MgCl2 or CaCl2 in solution

I have an aqueous solution of either $\ce{MgCl2}$ or $\ce{CaCl2}$ in solution with $\ce{K2SO4}$. There is a white precipitate that forms on the bottom that does not dissolve when $\ce{HCl}$ is added ...
0
votes
0answers
46 views

Solubility of different compounds?

I am the typical student that is very bad in organic chemistry. I understand that some of you might find my question trivial and would instruct me to go google up my answers instead. I have tried ...
1
vote
1answer
34 views

Approximating the concentration of ions when a salt dissociates

In my textbook written that: Given that $K_\mathrm{sp}(\ce{Ag2CrO4})=9.0\times 10^{-12}$, consider the solubility of $\ce{Ag2CrO4}$ in a $0.100\:\mathrm{M}$ solution of $\ce{AgNO3}$. Initial ...
1
vote
0answers
23 views

Solubility of non polar substances in non polar solutions

From my understanding, the general rule for solubility is that polar molecules are soluble in polar liquids (e.g. water), and non polar substances are soluble in non polar liquids (organic solvents). ...
8
votes
3answers
272 views

Differentiation between Zn(2+), Al(3+), Mg(2+) in solution

If I have three aqueous ionic solutions in which I know that the cation is $\ce{Al^3+}$, $\ce{Mg^2+}$, or $\ce{Zn^2+}$, and that how do I find out which is which? I was thinking to add $\ce{OH-}$ in ...
2
votes
1answer
38 views

Is solubility in Qsp affected by coefficient?

Related to my previous question: Is solubility coefficient affected if ion data is given in Ksp? $200\,\mathrm{mL}$ solution of $0.02\,\mathrm{M}\,\ce{AgNO3}$ is added to $200\,\mathrm{mL}$ ...
5
votes
1answer
32 views

What is the Ksp of Al(OH)3?

Top hits on google are: This site Aluminum hydroxide $\ce{Al(OH)_3}$ >> $ 1.3×10^{–33}$ and This site Aluminum hydroxide $\ce{Al(OH)_3}$ >> $ 3×10^{–34}$ which is one order of magnitude ...
1
vote
0answers
24 views

Reference request for the number of solvents around a solute

I want to know if there is a way to find number of solvent molecules that are directly embracing a solute molecule ( something like a reference or table that shows waters of hydration ). Particularly ...
8
votes
0answers
99 views

How to calculate the pH of a saturated solution from its solubility constant Ksp and acidity constant Ka?

Given that $K_{\mathrm{sp}}(\ce{CaF2})=3.2\cdot 10^{-11}$, $K_{\mathrm{a}}(\ce{HF})=10^{-5}$, and $K_{\mathrm{w}}=10^{-14}$. Calculate $\mathrm{pH}$ of saturated $\ce{CaF2}$. Here is my ...
3
votes
1answer
36 views

Is solubility coefficient affected if ion data is given in Ksp?

Recently I've been looking at this website, which says: The $K_{\mathrm{sp}}$ of $\ce{Cr(OH)3}$ is $6.70 \times 10^{-31}$ Problem 1: What is the minimum $\mathrm{pH}$ at which $\ce{Cr(OH)3}$ ...
10
votes
1answer
178 views

Why solubility decreases with temperature increase?

Recently I was researching $\ce{Ca(OH)_2}$, and I found this on Wikipedia: Can you explain why solubility decreases when temperature increases?
1
vote
0answers
9 views

Why cooling an exothermic solution it increases it's solubility? [duplicate]

In my chemistry book writes that cooling an exothermic solution(e.g. $\ce{NaOH + H2O}$) increases it's solubility, and I can't understand why since the cooling should decrease it.
0
votes
2answers
64 views

Solubility of C5H11OH and C5H11Cl

Objectively, what makes the solubility of $\ce{C5H11OH}$ greater than the $\ce{C5H11Cl}$ in water?
5
votes
0answers
23 views

Old red sample of sodium tetraphenylborate, why it is red?

Got an really old sample of sodium tetraphenylborate. It should be white, but it is red. Does any know what was formed and how it influences precipitation of cations in water?
2
votes
0answers
31 views

Crystallization issue

For solid-liquid mixtures, cooling crystallization process can be used to separate the solute substances from each other. Assume that we have two salts that have very close solubility in a certain ...
2
votes
1answer
30 views

Henry's constant and solubility

According to Henry's law The solubility of gas in a liquid is directly proportional to the partial pressure i.e S=Kp My book says that higher the value of K at a given pressure lower is the ...
4
votes
2answers
74 views

How to determine which salt will precipitate from a solution containing multiple ions?

I have a solution containing $0.2\:\mathrm{mol}$ of $\ce{Br^-}$ ions and $\ce{SO_4^2-}$ ions each. Now if I add excess $\ce{AgNO3}$ in this solution, what will precipitate? $\ce{Ag2SO4}$ or ...
1
vote
1answer
31 views

Cohesive Energy Density table request

Quick question: Any one knows a resource for Cohesive Energy Density of some organic materials ? I am not looking for any specific molecule, actually I want to plan my project based on available ...
3
votes
1answer
37 views

Why do exothermic dissolution reactions occur?

I've always been taught that an exothermic dissolution means that the forming of solute-solvent bonds releases more energy than the energy consumed to break solute-solute bonds and solvent-solvent ...
3
votes
1answer
53 views

Mixing solvents, or how does paint thinner work?

I would like to understand how a mixture of solvents works together. For example, there are two solvents combined, and each one allone can dissolve some material, but one acts faster. How do they ...
1
vote
2answers
56 views

Double Replacement Reactions form Precipitates

Why do most all double replacement reactions result in a precipitate and an aqueous molecule? Is it because the individual solute molecules always form stronger bonds such as how in single replacement ...
0
votes
0answers
55 views

Concentration cell lower half cell concentration from measured cell potential

I am trying to find the Ksp of silver thiocyanate: AgSCN(s) --> Ag+ (aq)SCN-(aq) but I need to first prove that the lower [Ag+] = 1.27-12 M, but don't know how to find it. The data I am given: ...
1
vote
3answers
54 views

Effect of pressure on solubility of salts

The volume of certain saturated solution is greater than the sum of the volumes of the water and salt from which it is made. On increasing pressure solubility of this salt (a) Increases ...
3
votes
3answers
872 views

How concentrated can an acid be?

How concentrated can an acid be without it being supersaturated? Is there a certain limit to how concentrated an acid or base can be? When I mean concentration, I mean molarity; so how concentrated ...
2
votes
1answer
48 views

Can a strong electrolyte be sparingly soluble?

A strong electrolyte is an electrolyte that completely, or almost completely, ionizes or dissociates in a solution. My book has a question: In a saturated solution of sparingly soluble strong ...
0
votes
1answer
20 views

Solubility problem, finding Ksp

The problem gives that the solubility of Silver dichromate is $8.3\times10^{-3} g/100mL$. I need to find $K_{sp}$ which is supposed to be $2.8\times10^{-11}$. $K_{sp}$ is $\ce{[Ag+]^2[Cr2O7^{2-}]}$ ...
3
votes
0answers
38 views

What substance has the lowest Ksp value?

What substance has the lowest $K_{sp}$? What is the value of its $K_{sp}$? The lowest I could find is $2.6*10^{-124}$ for cobalt(III) sulfide.
2
votes
1answer
84 views

Polarity of the nitrate ion

We observe that nitrate ion has a trigonal planar geometry according to its lewis structure and the VSEPR theory. Its resonance hybrid consists of three contributing structure -three probable double ...
1
vote
1answer
35 views

Changing solubility of metal complex by adding ethanol

After creating a solution of copper(II)-sulfate-pentahydrate, water and concentrated ammonia, the newly formed complex (tetraamminecopper(II)-sulfate-monohydrate) is completely dissolved in water. By ...
1
vote
1answer
45 views

Why are transition metal hydroxides insoluble?

From what I understand, adding $\ce{NaOH}$ to a solution containing transition metal ions gives transition metal hydroxide precipitates. Why is $\ce{NaOH}$ soluble but transition metal hydroxides ...
0
votes
0answers
55 views

Does sorbitol dissolve in ethanol?

I know Sorbitol, $\ce{C_6H_14O_6}$ $$\ce {C(OH)H_2 (C(OH)H)_4C(OH)H_2}$$is soluble in water however I did not have much luck finding out whether or not it is soluble in ethanol. My guess is that it ...
2
votes
1answer
54 views

Solubility of Ca(OH)₂ as determined by experiment

For a lab I had to determine the solubility and $K_{sp}$ of $\ce{Ca(OH)2}$ by performing two different titrations. I am given the formula to find solubility in molarity it is as written below. ...
0
votes
1answer
42 views

3rd analytical group of cations

If a mixture of Mn$^{2+}$, Zn$^{2+}$, Co$^{2+}$, Ni$^{2+}$ and Al$^{3+}$ salts is dissolved in water, a white dim solution is obtained. I guess that the aluminium and zinc ions hydrolysed and the ...
1
vote
3answers
49 views

Does tetramine copper dissolve cellulose?

I saw a Youtube video which showed that cotton (cellulose) dissolves in deep blue solution of tetramine copper made by adding 20% ammonia in copper carbonate salt. I tried to replicate the process ...
1
vote
1answer
31 views

Solubility determination of Ca(OH)₂ in water

In one problem it's asking me to find the solubility of $\ce{Ca(OH)2}$ in water. In that problem it assumes the starting concentration $\ce{OH}$ to be zero. But for other problems like $\ce{BaSO4}$ in ...
12
votes
3answers
144 views

Is it possible to make a drug that liquefies heart plaque to treat heart disease?

Is it possible to make a drug that liquefies heart plaque to treat heart disease without damaging other parts of the body? If so, would the liquefied plaque be eliminated as regular fluid is through ...
2
votes
1answer
94 views

How to calculate the solubility of AgCl in a MgSO₄ solution?

The solubility product of $\ce{AgCl}$ in water is given as $1.8\cdot10^{-10}$ Determine the solubility of $\ce{AgCl}$ in pure water and in a $0.25~\mathrm{M}$ $\ce{MgSO4}$ solution. I solve to the ...
0
votes
0answers
91 views

Purity of precipitate in selective precipitation

An aqueous effluent contains 12 M Cd2+ and 10 M Mg2+ as solution of nitrates. Current practice is use NaOH to selectively precipitate the metals. (a) Is it feasible to get 0 Cd impurities in Mg ppt ...
-4
votes
1answer
93 views

Ksp of calcium hydroxide

What would the Ksp of calcium hydroxide be at around room temp (66 Fahrenheit) and 1 atm of pressure? I know the Ksp value varies with temperature, but is there a notable difference from 20 degrees C ...
0
votes
1answer
221 views

Salicylic acid - polarity and solubility

Really confused about this, since there is carbon and two other types of atoms: should be polar, right? However, some people online say it is non-polar. Also, is it soluble in water?
4
votes
1answer
386 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 ...
1
vote
3answers
682 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
votes
2answers
468 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
votes
2answers
61 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
votes
1answer
525 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?