[bentrix]

Hi, this is my first posting.
I hope you can help me out. Sodium chloride is highly soluble in water. A saturated solution has 6.2 M Na. Now my question: is it possible to dissolve more sodium in water (room temperature) than 6.2M? Perhaps using a combination of sodium salts?
I am looking forward to your answers. Thanks in advance.

Suzette

[Arkcon]

Hi, this is my first posting.
I hope you can help me out. Sodium chloride is highly soluble in water. A saturated solution has 6.2 M Na. Now my question: is it possible to dissolve more sodium in water (room temperature) than 6.2M?

It is easier to supersaturate some solute/solvent systems, than it is for others.  NaCl is not one that I recall is easy to keep supersaturated.

Perhaps using a combination of sodium salts?

Because of the common ion effect, that suggestion actually makes a supersaturated solution less likely. 

[BluRay]

Hi, this is my first posting.
I hope you can help me out. Sodium chloride is highly soluble in water. A saturated solution has 6.2 M Na. Now my question: is it possible to dissolve more sodium in water (room temperature) than 6.2M? Perhaps using a combination of sodium salts?
I am looking forward to your answers. Thanks in advance.

Suzette

Ion activities is reduced in a solution with higher ionic strenght:
http://en.wikipedia.org/wiki/Ionic_strength

So, in a concentrated solution of KNO3 (for example) the solubility of a salt made of other ions (as NaCl) increases, with respect to pure water.

[ARGOS++]

Dear Suzette;

For example:
Sodium acetate:  ~9  molar:  76g/100ml, d= ~1.25 g/ml 25°C NOT supersaturaded!
                            http://en.wikipedia.org/wiki/Sodium_acetate   
In the real supersaturated state at 25°C:  ~18 molar:  ~150g/100ml.

NaNO₃:  ~10 molar 25°C

Good Luck!
                    ARGOS⁺⁺

[Borek]

Ion activities is reduced in a solution with higher ionic strenght:

Reduced at first, but goes up for higher ionic strengths.

[bentrix]

Dear Suzette;

For example:
Sodium acetate:  ~9  molar:  76g/100ml, d= ~1.25 g/ml 25°C NOT supersaturaded!
                            http://en.wikipedia.org/wiki/Sodium_acetate   
In the real supersaturated state at 25°C:  ~18 molar:  ~150g/100ml.

NaNO₃:  ~10 molar 25°C

Good Luck!
                    ARGOS⁺⁺