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Molarity/Molality = (moles of solute/volume of solution) × (mass of solvent/moles of solute) = mass of solvent (in kg)/volume of solution (in litre) = mass of solvent (in grams)/volume of solution = W/V Let the density of the solution be d. Unit= g mL−1 Mass of solution = V × d Mass of solute = number of moles × molecular mass of solute = n mAMass of solvent, W = mass of solution – mass of solute = V × d – n × mA Thus, Molaity/Molality (M/m) = V×d–n×mA/V Molaity (m) = molarity×V/V×d–n×mA =molaity/d–n/V×mA m =molaity/d–molaity×mA where wZ, wBare masses of solvent and solute respectively xAand xBare mole fractions of solvent and solute respectively mAis molecular mass of solvent.ThanksBharat BajajAskiitians faculty
Molarity/Molality = (moles of solute/volume of solution) × (mass of solvent/moles of solute)
= mass of solvent (in kg)/volume of solution (in litre)
= mass of solvent (in grams)/volume of solution = W/V
Let the density of the solution be d. Unit= g mL−1
Mass of solution = V × d
Mass of solute = number of moles × molecular mass of solute
= n mA
Mass of solvent, W = mass of solution – mass of solute
= V × d – n × mA
Thus, Molaity/Molality (M/m) = V×d–n×mA/V
Molaity (m) = molarity×V/V×d–n×mA
=molaity/d–n/V×mA
m =molaity/d–molaity×mA
where wZ, wBare masses of solvent and solute respectively xAand xBare mole fractions of solvent and solute respectively mAis molecular mass of solvent.
Thanks
Bharat Bajaj
Askiitians faculty
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