Question

What is molality of 10% w/w naoh solution?

Answer 1

Answer:

Mass% of NaOH=10%

=10/100

In 100g solution,

Mass of solute(w)=10g

Mass of solvent(W)=100-10=90g

Molar mass of NaOH=(1*23)+(1*16)+(1*1)

=40g

Molality= w × 1000

____________

molar mass ×W

=10×1000

_______

40×90

=2.78mole/kg