out of molality and molarity which is better for expressing the concentration of solution.
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they each have their place
.. molarity = moles solute / liter of solution
.. molality = moles solute / kg solvent
if you have a solid solute, you can readily measure it and transfer it to a volumetric flask and dilute to the line with a solvent to make a particular molarity
if you have a solution with a known molarity, you can readily dilute to another molarity with a volumetric flask.
on the other hand, you can readily measure the mass of a solute and mass of a solvent and you can analytically combine the two to make a particular molality.
in some cases, you might need the density of the solution to handle the calcs with molarity. not with molality
.. molarity = moles solute / liter of solution
.. molality = moles solute / kg solvent
if you have a solid solute, you can readily measure it and transfer it to a volumetric flask and dilute to the line with a solvent to make a particular molarity
if you have a solution with a known molarity, you can readily dilute to another molarity with a volumetric flask.
on the other hand, you can readily measure the mass of a solute and mass of a solvent and you can analytically combine the two to make a particular molality.
in some cases, you might need the density of the solution to handle the calcs with molarity. not with molality
Answered by
1
Hey friend
Molality is better for expressing the concentration of solution.
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