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Glite Dictionary
molal

molal

9.9
A solution with one mole of dissolved substance per kilogram of the liquid that dissolves it
  • adjective
  • /moʊˈlæl/
  • Specialized
translation icon : molal
  • Unlike molar solutions, molal concentrations are not affected by temperature changes.

Examples

  • The chemist prepared a molal solution by dissolving one mole of salt per kilogram of water.

  • A molal solution is defined as having one mole of solute per kilogram of solvent.

  • Calculations involving molal concentration are common in thermodynamics.

  • The solution is molal.

  • The chemist prepared a molal solution by dissolving one mole of salt per kilogram of water.

  • Calculations involving molal concentration are common in thermodynamics.

  • Unlike molar solutions, molal concentrations are not affected by temperature changes.

Compounds

molal concentration
  • Specialized
8.6

The amount of dissolved substance in each kilogram of the liquid that holds it

Surface Forms

molal positive

Morphology

molal = mole (semi-transparent) = mole + al

The adjective is transparently related to the chemistry unit 'mole', but the exact technical meaning is specialized and not directly predictable for an average learner.

Etymology

The word molal comes from the chemistry unit mol, a 'set number of particles', plus the ending -al meaning 'related to'. So a molal solution tells you how many moles there are 'per kilogram of solvent', which is why molal concentration does not change with temperature.