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

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1answer
20 views

Low solubility of propanal compared to propanol, propanone, propanoic acid and methyl ethanoate

I found on the internet that propanol, propanone, propanoic acid and methyl ethanoate where all completely soluble in water at room temperature. (23 degrees Celsius) But I found that propanal was, ...
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0answers
19 views

Iron triiodide in water

How does FeI3 react with water? I can not find any data about it's solubility in water, so, I suppose, it may formate some hydrated complex structure (e.g. Fe[FeI4(H2O)2]2), or disproportionate up to ...
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0answers
15 views

How do we know *all* nitrates are soluble? [duplicate]

On my solubility table from class, it states some rules for solubility, including the fact that all nitrates are soluble. How do we know this?
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0answers
27 views

How to get a saturated solution of potassium chlorate? [closed]

A solution is made by dissolving $20~\mathrm{g}\ \ce{KClO3}$ in $100~\mathrm{g}\ \ce{H2O}$ at $60~\mathrm{^\circ C}$. What are 3 ways to make this solution saturated?
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1answer
28 views

Solubility of silver acetate in the presence of nitric acid

What will be the effect on the solubility of $0.1\ \mathrm{mol}$ of $\ce{CH3COOAg}$ in presence of $1\ \mathrm{l}$ of $0.1~\mathrm{M}\ \ce{HNO3}$ solution? $$K_\mathrm{sp} (\ce{CH3COOAg}) = 10^{-...
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0answers
17 views

How do ion–dipole bonds manage to break apart an ionic lattice?

I was reading this answer and its reasoning behind the dissolution of NaCl seems to lie in entropic favorability. However, as it states, many, if not most, dissolution reactions are favored by ...
4
votes
2answers
146 views

Why is EDTA most soluble at a pH 8? (addition of NaOH)

Although Wikipedia says that EDTA is a very soluble salt, preparing a solution (.5M) is a pain in the neck. It takes a lot of time and still doesn't dissolve. Although addition of a few drops of NaOH ...
0
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0answers
10 views

Can iron oxide powder waste from the operation of Fabrication Laser be re-solidified by adding water and making a slurry that then is dried?

I am looking for a simply way to eliminate excess Iron Oxide waste from the operation of Fabrication Lasers. I am seeking an alternative to this waste being handled as a powder.
1
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1answer
30 views

How to measure saturated salinity and mineral levels for flaked sea salt?

I am a sea salt enthusiast looking to make the perfect flakey sea salt. I start with sea water and boil it down to a thick brine. Then with less heat I reduce the brine more slowly and inverted salt ...
0
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0answers
6 views

Solubility specification in a standard

I'm reading a standard where under the specification for a substance it says: Solubility in Alcohol: 1 ml in 3 ml 50% alcohol remains clear to 8 ml. Just wanted to confirm my interpretation: I ...
5
votes
1answer
158 views

How is NaOH able to clear a solution of Paraformaldehyde?

While making a solution of $4~\%$ para-formaldehyde for immunohistochemistry (to fix the tissue), we add para-formaldehyde into water and stir. It looks like a chalky supersaturated solution even ...
1
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1answer
55 views

Why does Cu(OH)2, which is generally insoluble due to low Ksp become soluble in excess of a base, such as NaOH?

Where does the "excess" criteria come into the picture? Also, can the equilibrium $$\ce{Cu^2+ + 6 H2O <=> [Cu(H2O)6]^2+}$$ participate in the solubility process in any case? So there are 2 ...
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0answers
23 views

Free energy of solvation of gases

I am calculating free energies of solvation and enthalpies of solvation from experimental Henry constants of solubility of CO$_2$ in cyclohexane. Free energy of solvation is obtained from the relation ...
0
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0answers
18 views

How does lignin dissolve after hydrolysis with sulfuric acid?

The hydrolysis is performed on biomass and consists of pretreatment with 72% sulfuric acid at 30 degrees Celsius for 1 hour. Then water is added in order to dilute the acid concentration to 4%. Then ...
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0answers
33 views

What is the physics/chemistry behind gold dissolution in water/seawater?

Global ocean contains some amount of dissolved gold (around 0.05-0.005 ppb). Is it ions of gold? Is it just suspended atomic gold (like water vapor in gases - just suspended molecules)? Can pure ...
3
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0answers
49 views

Why does the solubility of some salts decrease with temperature?

It is well known to us that the Solubility of solute in a solution increases with the increase in the temperature because, when the temperature increases the molecules of the solvent gain more kinetic ...
4
votes
1answer
62 views

How soluble is uranium in molten iron?

As I know, uranium and iron simply aren't mixable, which means there are no U-Fe alloys. The Google says, uranium is insoluble in molten iron. But, if something is "insoluble", it actually means only ...
2
votes
1answer
68 views

How to extract caffeine from coffee

To extract caffeine from coffee, I tried reacting it with baking soda to make tannins more soluble. I then put in salt to push caffeine out of solution. I saturated it with salt and then mixed the ...
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0answers
36 views

Why are Alkali Metal Ions Soluble?

I think the question needs no elaboration. Why are salts containing Group 1A cations extremely soluble in water? I speculate that the reason involves the low charge density of those ions in a given ...
1
vote
1answer
52 views

Which isomers (cis or trans) are more water soluble?

As a general sense I know that cis isomers are less symmetrical and more polar in nature whereas trans isomers are less polar. Now given those information, would it be appropriate to assume that cis ...
4
votes
1answer
71 views

Vapor pressure of immiscible liquids

I have read that vapour pressure of a mixture of two immiscible liquids is $$P=P^0_A + P^0_B$$ where A and B are immiscible liquids. My question is, if they are immiscible, they would form separate ...
0
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1answer
32 views

How to calculate the new concentration of a solution after adding more solute and convert it to ppm?

My question is the following: $2~\mathrm{g}$ table salt is added to $0.5~\mathrm{m^3}$ water whose salt concentration is $10~\mathrm{mg\,L^{-1}}$. Compute the salt concentration of the mixture in ...
0
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1answer
53 views

After opening, when is a can of Diet Coke most acidic? (Based on a true story)

Situation: Clogged toilet, no plunger. Goal: Trying to use the acidity from a can of Diet Coke as toilet drain cleaner. Question: How can I maximize the acidity of a Diet Coke? Question 1: Should I ...
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0answers
27 views

Does the activity product decrease with increasing ionic strength?

I have a question regarding what happens to the solubility of $\ce{CaSO_4}$ or the rate that $\ce{CaSO_4}$ will dissolve when we add $\ce{NaCl}$ to the solution: $\ce{CaSO_4}$ will dissolve into $\...
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0answers
22 views

Equilibrium constants and

I have a few questions about this two relations: We know that: $K_p$ = $e^{\frac{-\Delta G^0}{RT}}$ $(1)$ and $K_c = K_p (RT)^{\Delta n}$ $(2)$ Ok now I'm solving this problem about solubility: ...
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1answer
22 views

Calculate Solubility [closed]

So I've been looking at some chemistry processes and I was trying to conclude how they got the numbers they got. How would I go about calculating the solubility of Phenyl-2-nitropropene in Isopropyl ...
0
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1answer
42 views

How to calculate the amount of substance of nitrogen that dissolves in water?

The Henry's law constant for the solubility of $\ce{N2}$ gas in water at $298~\mathrm{K}$ is $10^5~\mathrm{atm}$. The mole fraction of $\ce{N2}$ in air is $0.8$. The amount of substance of $\ce{N2}$ ...
3
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0answers
46 views

The behaviour of Ag3PO4 in solution

To a 1L flask, we add $4.1900\mathrm{g}$ ($0.01001\ \mathrm{moles}$) of $\ce{Ag3PO4}$, then fill it up with water. Knowing the following constants, we are asked to find the concentration of all ...
2
votes
1answer
85 views

Why do alcohols and ethers have approximately the same solubility in water but different boiling points?

In Morrison & Boyd, I found this question: Butan-1-ol (b.p. $118~\mathrm{^\circ C}$) has a much higher boiling point than its isomer diethyl ether (b.p. $35~\mathrm{^\circ C}$), yet both ...
3
votes
1answer
57 views

Understanding effect of ph on solubility of salt

In the following picture why Ksp is not simply S2- ? Why is f included with one species only? Please explain the last part. What does f represent and why it is used in molar solubility?
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1answer
46 views

How to filter out magnesium acetate (a soluble salt) quickly and cheaply from water

I am conducting an experiment that involves reacting a weak acid and a weak base to form water and a salt with this overall equation $$\ce{Mg(OH)2(s) + 2CH3COOH(l) <=> 2H2O(l) + Mg(CH3COO)2(aq)}...
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28 views

Moderately soluable

In solubility rules, there is some exceptions. It says for example: All sulfate ($\ce{SO4^2-}$) compounds are soluble except those of $\ce{Ba^2+}$, $\ce{Sr^2+}$, $\ce{Ca^2+}$, $\ce{Pb^2+}$, $\ce{Hg2^...
2
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0answers
27 views

Solubility of n-butanol and n-butanamine

I ran across something saying that n-butanamine is miscible in water while butanol is only partially soluble. Is this correct? Can anyone offer an explanation? I would have guessed that the decreased ...
1
vote
1answer
48 views

Freezing Point Depression Problem

Assuming an ideal solution, which of these 0.10 M solutions would have the least freezing point depression? $\ce{HCl}$ $\ce{NaBr}$ $\ce{KNO_3}$ $\ce{MgSO_4}$ They all produce ...
2
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1answer
32 views

What solutes will give the largest reduction in volume when dissolved in water

This question is inspired by another question. If you take some common salt (NaCl) and some water and mix them, then the volume of the solution is less than the volume of the constituents. I did ...
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2answers
72 views

Solubility of succinic acid in water vs ethyl acetate?

Today I completed an organic lab practical test about discontinuous extraction. I had to extract succinic acid from a water solution using ethyl acetate as the solvent extractor. After the extraction,...
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1answer
52 views

Unique Solubility Expression for Sulfide Salts

While looking at aqeuous $\ce{K_{sp}}$ values in the back of my textbook, I noticed that there is a asterisk by all of the sulfide compounds (such as $\ce{HgS}$), and the asterisk says, "For a ...
1
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1answer
21 views

Mixing a Tagged Sample of Lead Iodide with another Iodide Salt [closed]

A sample of sparingly soluble $\ce{PbI_2{(s)}}$ containing radioactive $\ce{^{133}I}$ is added to 0.10 M $\ce{KI_{(aq)}}$ and stirred overnight, what happens? I The radioactivity of the liquid phase ...
1
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1answer
97 views

How to calculate saturation point of a solution?

Is there a way to calculate theoretical saturation point between 2 materials? For example, let's say I want to determine solubility of vitamin A in water, or vitamin B in olive oil, or vitamin D in ...
2
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0answers
20 views

Looking for solubility kinetics of zinc chloride hydroxide monohydrate

$\ce{Zn5(OH)8Cl2·H2O}$ is a crystalline solid insoluble in water. Often used as nutritional supplement. Preparation and chemistry of zinc chloride hydroxide monohydrate is known. I am looking for some ...
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0answers
21 views

Preventing precipitation of Ca(HPO4)2

Determine the $\ce{[H+]}$ needed to just prevent precipitation by $\ce{H2PO4^-}$ in a 0.25 M $\ce{H3PO4}$ solution that has $\ce{[Ca^{2+}]}$ = 0.15 M. The $K_{a1}$ of $\ce{H3PO4}$ is $7.1 \times 10^{...
2
votes
2answers
64 views

Does exothermic solvation mean solute is more soluble at low temp?

(I'm surprised this question or a very similar one hasn't been asked, so I wouldn't be surprised if I just failed to find a question with my search that does answer this question.) I dissolved some $\...
2
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0answers
50 views

Poor aqueous solubility of chloroazodin

Below is the structure of chloroazodin: Why is chloroazodin poorly soluble in water? It has multiple amine and imine nitrogens, all of which appear to be available for hydrogen bonding, and thus it ...
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2answers
30 views

Relative Solubilities of Salts in Acidic Solution [closed]

While studying for the Chemistry Olympiad, I stumbled across this problem which I don't understand the answer to: Which solid is much more soluble in 1 M $\ce{HCl}$ than in $\ce{H2O}$? (A) $\ce{...
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1answer
22 views

Solution , Solubility and Colligative Property? [closed]

Which of the following 0.1 M aqueous solution will have the lowest freezing point ? 1) Glucose 2) Urea 3) NaCl 4) K2SO4 How to relate Molarity with freezing point ? Should I use the relation ...
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0answers
31 views

Why does adding PBS to a lipid+propylene glycol solution cause the lipid to precipitate?

I am trying to create an aqueous phospholipid suspension using ~50 mg of 1,2-dibehenoyl-sn-glycero-3-phosphocholine (DBPC), 13 mL of propylene glycol (PG), and 72 mL of phosphate-buffered saline (PBS)....
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0answers
13 views

What is the chemical equation for this specific titration experiment and the solubility of the potassium nitrate solution?

In the experiment I performed a titration by adding 5cm3 0.25M KNO3 (saturated with AgBrO3), 10cm3 1M HCl and 10cm3 10% HI solution together and allowed to sit for 3 minutes. The chemical equation I ...
2
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0answers
26 views

Gas solubility in water and alcohol

I know that a certain gas is soluble in water but not in alcohol. How can I find the solubility of the gas in mixture of water and alcohol? Do I use a simple linear relation? The gas in question is ...
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1answer
48 views

Solubility of Alum

What is solubility product of $\ce{K2SO4. Al2(SO4)3.24H2O}$? Can we consider $K_{\rm sp}$ of salts $\ce{K2SO4}$ and $\ce{Al2(SO4)3}$ or something else to find solubility? I know that Sulphate ...