Is there a way to buffer osmolarity similar to how pH can be buffered?
For instance, lets say I have a solution with a given osmolarity. Then I add salt, which would ideally increase the osmolarity. However, the osmolarity stays constant thanks to an osmolarity buffer. This could either be caused by molecules precipitating or molecules that somehow combine in solution.
Does this exist?
Dear Sammy Pontrelli ,
Interesting discussion point! Following!!
One thought is that you could use a salt with limited solubility, so that the dissociated ions and undissociated salt molecule are in equilibrium. If something occurs to cause removal of one of the ions, or more of one of the ions is added, then the equilibrium would be driven towards more or less dissociation, respectively. This is more about buffering the concentration of a particular ion, rather than osmolarity. A similar example is the commonly used procedure of divalent metal ion buffering using chelators that bind the metal with a suitable affinity for the purpose.
Interesting question. I don't know of any. I suppose one has to stay away from ionic species. If there is such a thing as a reversible covalent bonding between two nonionic species (such as concentration dependent) one can modulate osmolarity.
Sammy - Do you have such a thing?
Dear Sammy Pontrelli ,
I do share what Adam B Shapiro and Tapan K Das replied above. In addition with that the most important factor in determining osmolarity is the molarity of the solution. The more moles of solute, the more osmoles of ions are present.
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