All Questions
Tagged with aqueous-solution solubility
209
questions
4
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answers
2k
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How to break down soap and detergents?
I am building a greywater harvesting system. It is a 3-stage system:
The 1st stage breaks down soap and detergents.
The 2nd stage filters the water.
The 3rd stage pumps water out of system.
What ...
- 41
3
votes
2
answers
6k
views
Heat when dissolving solutes in water
Why do certain solutes dissolved in water release heat and other solutes absorb heat?
- 97
2
votes
2
answers
505
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Does removing solution affect a supersaturated solution
Given a mixture of: a saturated solution of a solute in a solvent together with excess of the solute compound as crystalline material.
If one were to change the bulk composition of the mixture by ...
- 123
0
votes
1
answer
490
views
How much water has boiled off when precipitation begins? [closed]
Here's a challenge problem I created! None of my students could get it; can you?
$25$ grams of table salt (NaCl) is dissolved in $150$ grams of water. The temperature of the solution is raised to its ...
- 113
1
vote
1
answer
57
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Two chemistry inquiries [closed]
Here is my second question, I know 1000 grams of water is 1 liter. But does the density affect the result? What if the substance is mercury?
When you add seed crystal in to a supersaturated solution, ...
- 2,688
5
votes
1
answer
1k
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Does supersaturated caffeine polymerize?
I tried preparing a supersaturated solution of caffeine by mixing anhydrous caffeine powder with water in a thin Turkish tea glass and heating it up over a candle (desperate times...).
This worked ...
- 457
5
votes
2
answers
12k
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Can two precipitates form in a precipitation reaction that starts with only two compounds in water? [closed]
Can two precipitates form in a precipitation reaction that starts with only two compounds in water?
- 235
2
votes
1
answer
6k
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How to liquefy or extract water from superabsorbent polymer?
I am looking for a good way to liquefy or extract water from superabsorbent polymer. From what I remember it was salt that can liquefy it. Since salt when dissolved will have sodium cation and ...
- 409
6
votes
1
answer
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Calculating Standard Gibbs Energy of Dissolution
The solubility of mercury (I) iodide is $\mathrm{5.5\ fmol/L}$ in water at $25\ \mathrm{^\circ C}$. What is the standard Gibbs energy of dissolution of the salt?
The reaction is
$$\ce{Hg2I2(s) -&...
- 161
0
votes
1
answer
31k
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How to calculate molality, molarity and mole fraction given density (g/mole)?
Calculate the molality, molarity and mole fraction of a $\ce{CuSO4}$
in a 17% m/m aqueous solution (density of the solution is 1.367 g/mole)
I did .17 * 1.367 to find grams of $\ce{CuSO4}$
and .83 * ...
- 9
5
votes
1
answer
486
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Thermodynamics behind Deliquescence?
The phenomenon of deliquescence wherein a water soluble substance absorbs water from atmosphere and dissolve in it forming a saturated solution, has thermodynamic roots. I have read the fact that the ...
- 6,795
30
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3
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Why do salts such as NaCl dissolve?
If we look at solubility of salts in water, we are told that they disassociate, because the positive $\ce{Na}$ ion is attracted to the partially negative oxygen in water and the negative $\ce{Cl}$ is ...
- 3,479
3
votes
1
answer
783
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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 ...
- 33
28
votes
7
answers
22k
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Why is silver chloride less soluble than silver nitrate?
Related: Reaction between silver nitrate and aluminum chloride
Experimentally, $\ce{AgCl}$ is insoluble in water, but $\ce{AgNO3}$ is soluble. They're pretty common in a lab (well, $\ce{AgCl}$ is a ...
- 15.2k