Question

what will be the molality of a 0.05m nacl solution

Answer 1

Answer:

molality will be 0.05

Explanation:

molality = no. of moles of solute/ volume of solution.

given,

molality = 0.05 m

volume of the solution = 1 L

no. of moles of solute = 0.05 mol

Take density of water = 1 kg

molality = moles of solute/ mass of solution

molality = 0.05/ 1

hence,

molality is 0.05

hope this answer will satisfy you ❣️

Answer 2

Answer:

Let the volume of solution be 1 litre

∴ Molarity=

Volumeofsolution(inL)

MolesofNaOH

∴0.05=Moles of NaOH

Now, Mass of solvent=Volume×Density

=1×1

=1kg

∴ Molarity=

Massofsolvent(i.e.H

2

O)inkg

MolesofNaOH

=

1

0.05

=0.05m