Question

The molality of a solution when 2 moles of NaOH is dissolved in 800 gms of water is: (Na=23)​

Answer 1

Explanation:

Formula for molality= number of moles of solute/mass of solvent in kilograms

so , moles of NaOH = 2(given)

mass of solvent = 800g= 800/1000 kg=0.8 kg

so molality = 2/0.8 = 2.5