how come density doesn't affect miscibility?

[Tina324]

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achiever chem #63 says that only polarity determines miscibility..but doesn't density affect whether 2 liquids are miscible as well?

 

[Hybridtavo]

achiever chem #63 says that only polarity determines miscibility..but doesn't density affect whether 2 liquids are miscible as well?

From what I have read and as well in one of the questions on topscore (which is like the same question u have) mentions the main factor is polarity. Solve dissolve likes.
My 2 cents

 

[Contach]

achiever chem #63 says that only polarity determines miscibility..but doesn't density affect whether 2 liquids are miscible as well?

what makes you think that density affects miscibility? tell me your rationale please...

 

[Contach]

oh. and there's a distinction between miscibility and solubility.. i hope you are clear on this first before you try to explain.

 

[Hybridtavo]

Miscibility is a term in chemistry that refers to the property of liquids to mix in all proportions, forming a homogeneous solution.

Solubility is a characteristic physical property referring to the ability of a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. Solute, can be a gas, another liquid, or a solid.

Sorry if I skipped this (wiki)

 

[Mamona]

Miscibility is a term in chemistry that refers to the property of liquids to mix in all proportions, forming a homogeneous solution.

Solubility is a characteristic physical property referring to the ability of a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. Solute, can be a gas, another liquid, or a solid.

Sorry if I skipped this (wiki)

Thank you for the info I went to bed last night thinking about that!!!!

 

[Tina324]

lol obviously my rationale is not right. can u guys please clear this up for me? I would think that two polar substances for example are IMMISCIBLE if one has a greater density than the other...because how could they create a homogenous mixture IF one's floating on top of the other?

 

[211183]

lol obviously my rationale is not right. can u guys please clear this up for me? I would think that two polar substances for example are IMMISCIBLE if one has a greater density than the other...because how could they create a homogenous mixture IF one's floating on top of the other?

Ok someone correct me if this is wrong. Contach, let me know, because you seem to know the explanation. But here are my 2 cents... they may be worth lesss than that though. 😛 Wait for someone to confirm before you accept it as "fact".

Miscibility means "complete solubility" in a way. Let me explain. Something that is miscible, will continue to form a homogenous mixture regardless of how much of each thing you add. Density does RELATE to miscibility in a way... but miscibility does not DEPEND on density. Only when the components are immiscible, can you determine which is more dense in two components by seeing which goes to the bottom-- ONLY in an immiscible solution. Also, I believe it is mostly for liquid phase. So polarity is what will determine the ability of the molecules to blend together. Like will dissolve like.

Emulsion is creating a heterogenous mixture of immiscible liquids. They will eventually re-separate. Not true of immiscible liquids.

In solubility, if you are adding, for example, NaCl or sugar into water, you will notice that at some point, you can't add anymore. It will be saturated, or supersaturated. Also, the NaCl and sugar will dissociate in the solution. This deals with solids in liquids, sometimes gases.


So basically, solubility is the ability of a substance, solute, to dissolve in the solvent.

Miscibility is the ability of the two to mix in any proportion, and being able to create a homogenous mixture.

Sorry so long, jsut want to make sure I get it right.