Molality: Difference between revisions
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imported>David E. Volk (New page: {{subpages}} '''Molality''' is a unit of concentration used in chemistry and physics, especially when dealing with colligative properties. While the concentration unit [[molar...) |
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'''Molality''' is a unit of concentration used in [[chemistry]] and [[physics]], especially when dealing with [[colligative]] properties. While the concentration unit [[molarity]] ([[mole (unit)|moles]]/[[liter]] is more useful for chemical reactions, and [[normality]] is most useful for [[acid]]-[[base]] reactions, molality is often the most convenient concentration unit when dealing with physical properties of solutions. It is defined as moles of solute per kilogram of solvent. | '''Molality''' is a unit of concentration used in [[chemistry]] and [[physics]], especially when dealing with [[colligative]] properties. While the concentration unit [[molarity]] ([[mole (unit)|moles]]/[[liter]]) is more useful for chemical reactions, and [[normality]] is most useful for [[acid]]-[[base]] reactions, molality is often the most convenient concentration unit when dealing with physical properties of solutions. It is defined as moles of solute per kilogram of solvent, and is a useful unit when measuring [[vapor pressure]] depression, boiling point elevation, freezing point depression and [[osmotic pressure]] of solvents. | ||
Latest revision as of 15:28, 20 June 2009
Molality is a unit of concentration used in chemistry and physics, especially when dealing with colligative properties. While the concentration unit molarity (moles/liter) is more useful for chemical reactions, and normality is most useful for acid-base reactions, molality is often the most convenient concentration unit when dealing with physical properties of solutions. It is defined as moles of solute per kilogram of solvent, and is a useful unit when measuring vapor pressure depression, boiling point elevation, freezing point depression and osmotic pressure of solvents.