posted by Stephen on .
If you add 100 g of salt to 5 Kg of cooking water, how will it effect the boiling point? (molar mass of NaCl 58.5 g, Kbwater=0.51 degrees/m)
mols NaCl = 5000 g/molar mass NaCl.
Solve for mols.
molality = moles solute/kilograms solvent
solve for molality
Delta T = Kb*m
solve for Delta T. The boiling point will be raised by the amount of Delta T.
delta T = Kb*m