Question

2m urea solution is diluted from 2 kg 25 kg and what is the molality of diluted solution

Answer 1

molality is the number of moles of solute dissolved in 1 kg of solvent

Inchemistry, themolality,b(orm), of asolutionis defined as theamount of substance(inmol) of solute, divided by themass(inkg) of thesolvent, (notthe mass of the solution):

[b = \frac{n_{solute}}{m_{solvent}}]

now,

2=mole of urea/2

mole of urea=4

now new molality=4/5=.2 molal

hope you will get helped from this answer ....... ; )