All Questions
13
questions
4
votes
1
answer
366
views
Variation of conductance of saturated aqueous solution with temperature
The following question was asked in JEE Mains 2020:
Let $C_{\ce{NaCl}}$ and $C_{\ce{BaSO4}}$ be the conductances (in S) measured for saturated aqueous solutions of $\ce{NaCl}$ and $\ce{BaSO4}$, ...
- 476
2
votes
0
answers
109
views
Gouy-Chapman model
Recently I have been investigating the problem of a neutral solutions (with equal number of anions and cations) interacting with an infinite surface $z=0$ with electrostatic potential $\phi(z=0)=\...
- 121
6
votes
0
answers
164
views
Why is supersaturated sodium acetate so (meta)stable?
Sodium acetate is a common example used in general chemistry lectures to illustrate the idea of supersaturation, and that precipitation of a supersaturated solution can be initiated by a seed crystal. ...
- 161
0
votes
1
answer
254
views
How does solutions of two liquids work? [closed]
When two liquids mix, and they are not hindered by a polarity mismatch (like oil and water), why don't they always form a homogenous mixture? Due to entropy, a liquid will disperse itself evenly. This ...
- 205
-1
votes
1
answer
910
views
Why do azeotropes boil at constant temperature? [closed]
As given in the Wikipedia page,
An azeotrope (/əˈziːəˌtroʊp/) or a constant boiling point mixture is a mixture of two or more liquids whose proportions cannot be altered or changed by simple ...
- 623
-1
votes
2
answers
1k
views
In a double displacement reaction, why don’t the two products reform after being dissolved in water? [duplicate]
Let’s say I have $\ce{AB (aq) + CD (aq) —> AD + CB}$. When AB and CD are dissolved in water, they get dissociated into their component ions. But why don’t they reform as AB and CD, if it is already ...
2
votes
1
answer
129
views
What is the interaction between dissolved ions of opposite valence in a solution at rest?
NaCl is dissolved in water. Ions sodium and chloride are sufficiently free from each other so that they may occupy different regions of the solution after an active transport process through a ...
- 123
0
votes
0
answers
699
views
Can a solute be physically filtered out of a solvent?
Suppose that I have a substance dissolved in water. I then pour the solution into a filter. The filter's pores are large enough to allow the passage of water, but not the passage of the substance. In ...
- 1,264
0
votes
0
answers
134
views
Can a substance be extracted from solution by adding another substance with a higher solubility?
Suppose that I have a substance X dissolved in water. I then add a substance Y to the solution. Substance Y has a higher solubility in water than substance X, and more than enough of substance Y is ...
- 1,264
3
votes
1
answer
204
views
Flaw in my logic on Henry's Law?
It states mathematically $ p=Kx $ where $x$ is mole fraction of dissolved gas and $p$ is partial pressure of the gas.
Dissolution of gases is exothermic, so with increase in temperature, solubility $x$...
- 41
1
vote
0
answers
485
views
Hydrogen Peroxide - Iron Nail Galvanic Cell?
I am planning to create a simple galvanic cell made up of common household materials.
Suppose I have hydrogen peroxide (to serve as cathode), diluted in water, in one beaker, and I have a bunch of ...
- 11
8
votes
2
answers
2k
views
Is there a soluble salt, or compound that when dissolved in water results in a solution with density less than pure water?
Generally water soluble salts tend to 'fit between' the molecules of water such that the volume of the resulting solution does not increase much relative to the volume and added mass of the salt. So ...
- 2,773
3
votes
0
answers
1k
views
What would happen if I mix salt and sugar in a cup of water? [duplicate]
If I mix water in a cup with sugar at some stage the solution will become saturated and no more sugar will dissolve into the water. If I now add salt to the solution will the salt dissolve into the ...
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