For questions related to the solubility of compounds in various solvents, especially in water.
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How to calculate mole fraction of each element in an ionic compound? [closed]
A solution is prepared by dissolving 518g of K2SO4 in a small amount f water and diluted it with water to a volume of 2.5L(calculate the mole fraction of water,K+,SO4-2)
I got that the mole fraction ...
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0answers
30 views
How to calculate molarity,molality, vapor pressure, freezing point, boiling point? [closed]
A solution is prepared in a cold room(4.0 C) by dissolving 118g of potassium nitrate(KNO3) in 750 mL of water. The resulting solution had a volume 745 mL.
Calculate the molarity of the resulting ...
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1answer
31 views
Ksp of Manganese Phosphate
I can't find the $K_{sp}$ value for Manganese Phosphate ($Mn_3(PO_4)_2$) anywhere online. Has it been measured? What is it?
3
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2answers
82 views
Can you carbonate a non aqueous liquid?
We have a home carbonator for makeing seltzer. It blows $\ce{CO2}$ under high pressure into water. Could I use it to carbonate corn oil? Is $\ce{CO2}$ soluble in a no aqueous solution?
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1answer
50 views
Boiling point and solubility
Which one of the following compounds has the highest solubility :
$$\ce{CH3CH3 \ \ \ \ \ \ \ \ \ CH3-O-CH3 \ \ \ \ \ \ \ \ \ CH3CHO \ \ \ \ \ \ \ \ \ CH3OH}$$
Which one of the following compounds ...
1
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1answer
41 views
Solubility in non-aqueous solutions?
How do you determine which solids are more soluble in non-aqueous solutions? Here is the question that I struggle to understand the answer to:
Which solid is much more soluble in 1 M HCl than in H2O?
...
4
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2answers
126 views
Increasing the solubility of Sodium Hydroxide
$NaOH \rightarrow Na^+ + OH^- \ \ \ \ \Delta H ^o = -44.51 \ kJ/mol$
The dissolution of sodium hydroxide in water is an exothermic process, and so, according to Le Chatelier's principle, cooling the ...
2
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1answer
76 views
Solubility of Calcium Fluoride in water
$\ce{CaF2}$ is insoluble in water, but $\ce{CaCl2}$, $\ce{CaBr2}$, $\ce{CaI2}$ are soluble. Why is this so?
3
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1answer
68 views
Influence of solubility at different pHs on the complexation constants
Given some small chemical compounds whose solubility varies with pH, and in the case of compounds that can form complexes, I have seen that the complexation constant varies with pH. I think there ...
6
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1answer
76 views
How to determine which gas is more soluble
I have a chemistry homework problem that asks whether $Br_2$ or $O_2$ is more soluble in water in room temperature. However, I can't seem to find a way to figure it out, short of looking it up.
Is ...
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0answers
78 views
Prediction of solubility (from chemical structure) at different pHs
I would like to know What is the best method for predicting the water solubility (and in other solvents) of a compound given its molecular structure at different pHs. What I know now is based on the ...
3
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1answer
41 views
Are pesticides used on fruit easily washed off?
I was hoping there'd be someone who studies pesticides here.
Are they water soluble?
Do they get absorbed in to the fruit?
How well would you have to wash the fruit to fully remove the residue?
3
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1answer
41 views
Is it possible to estimate a substance's water solubility from data like the substance's partition coefficient, dissociation constants, etc.?
If it is possible, how would you estimate a compound's water solubility from data like its partition coefficient, $ \log P $, its dissociation constant, $pK_a $, its molar mass, etc.?
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0answers
60 views
Can magnesium chloride absorb water and ammonia at the same time?
Anhydrous magnesium chloride will absorb ammonia to the tune of ($\ce{Mg(NH3)6Cl2}$).
Incidentally, magnesium chloride is usually a hexahydrate ($\ce{MgCl2(H2O)6}$) at STP.
My question is, could ...
2
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1answer
111 views
Why is my NaCl solution seemingly saturated, when I followed the recipe for an isotonic solution?
I prepared an isotonic solution of table salt in water following this recipe: 1 leveled coffee spoon of salt in 0,5L of water.
9g/L would be an isotonic solution, a leveled coffee spoon is commonly ...
3
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1answer
374 views
How to calculate the solubility of CaFâ‚‚ at different temperatures?
By 25° Celsius, I used the free energy table for $\small G$ for the reaction and got $\small K_{sp}= 10^{-9.02}$.
I now need to find out what the solubility is by 10, 20 and 30°C. Could you ...
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3answers
355 views
Methane seems to dissolve more readily in cold water. Why?
http://www.watertechonline.com/drinking-water/article/the-fine-points-of-methane-removal
When you are diluting air in the system and/or properly evacuating it, you must consider water temperature. ...
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2answers
238 views
Liquid which neither dissolves in water nor oil
I am looking for a liquid which is not miscible (or very close) with water or vegetable oil. Ideally, I want to have a container which shows three layers (the three liquids) with clear boundary ...
5
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1answer
111 views
Why do biphasic systems of fluorous and organic solvents form?
It's possible to select a perfluorinated hydrocarbon that is immiscible in another organic solvent, forming a distinct phase boundary. Such systems may become miscible at elevated temperature which is ...
2
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1answer
685 views
Why is calcium fluoride insoluble?
Why is calcium fluoride insoluble? $\ce{NaCl}$ is soluble, but $\ce{CaF2}$ is not. Why is this?
4
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5answers
492 views
Why is $\ce{AgCl}$ less soluble than $\ce{AgNO3}$?
Related: Reaction between Silver Nitrate and Aluminium Chloride
Experimentally, $\ce{AgCl}$ is insoluble in water, but $\ce{AgNO3}$ is soluble. They're pretty common in a lab (well, $\ce{AgCl}$ ...
5
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3answers
715 views
Reaction between Silver Nitrate and Aluminium Chloride
I googled a bit about what $\ce{AgNO3 + AlCl3}$ will become and found out the following:
$\ce{3AgNO3 + AlCl3 -> Al(NO3)3 + 3AgCl}$
But why? I know that $\ce{Ag}$ is higher up in the Reactivity ...
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2answers
1k views
Why does ice cream make soda fizz?
I've noticed that adding a chunk of ice cream to soda makes the soda fizz slightly near the soda-ice cream interface. I thought it was a physical effect due to the temperature, but adding ice has no ...
0
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1answer
592 views
Are there endothermic dissolution reactions? [closed]
Are there reactions like
$X(s) + n Y(l) \to X \centerdot Y_n(l)$
that are endothermic? What are X and Y then?
The material X should also be soluble to material Y.
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4answers
2k views
What is the difference between melting and dissolving?
What is the difference between melting and dissolving? I am looking some general features.
The answer should be adaptable to the melting/dissolving of ice cube (water) in a class of pure alcohol ...
4
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3answers
161 views
Experimental calculation of solubility product constant
I mixed $6.0~\rm mL$ of $.01\:\rm M$ $\ce{Pb(NO3)2}$ and $6.0~\rm mL$ of $0.02\:\rm M$ $\ce{KI}$ and $8.0~\rm mL$ of water and a precipitate (barely) formed. I calculated the $K_{sp}$ with ...
5
votes
3answers
450 views
Availabilty of magnesium ions in phosphate buffer
Phosphate buffer is a common buffer in biological applications, it's especially popular for NMR. Magnesium ions are necessary for many biological systems to work, though the amount of magnesium ions ...
