What is Osmolality?
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Solutions: A homogeneous mixture of solutes in a solvent
Solvent: The major, liquid component of a solution
Solutes: The minor components of a solution usually solids
Concentration: The relative amount of solute in a solution. Can be expressed in many ways: solute to solvent, solute to solution, mass to mass, mass to volume, etc.
Molarity: Molar concentration: grams of solute per liter of solution
Molality: Molal concentration: grams of solute per kilogram of solvent
Molecular weight: The sum of the atomic weights of all the atoms in a molecule
Mole: Gram molecular weight, molecular weight expressed in grams. One mole of sodium chloride weighs 58.44 grams.
Ionic solution: Certain molecules, when dissolved, dissociate into charged particles called ions
Non-ionic solution: Certain molecules, when dissolved, do not dissociate or ionize into charged particles.
Avogadros Number: The number of molecules in one mole (gram molecular weight) of a substance. One mole of non-ionic solute (such as sucrose) dissolved in one kilogram of water will yield Avogadros number of molecules. One mole of ionic solute dissolved in one kilogram of water will yield almost twice Avogadros number of particles.
Concentrative properties: When a solute is dissolved in a solvent, certain properties of the solvent (freezing point, boiling point, vapor pressure and osmotic pressure) are changed nearly in proportion to the concentration of the solute, expressed in dissolved particles. Avogadros number of particles, regardless of their size or shape, when dissolved in a kilogram of water, will change each of the concentrative properties a specific amount.
Papers and Publications
Osmo for beginnersOsmo