A NaOH solution has a density of 1.22 g/mL and is 20.0 wt % NaOH. What...

Question

Question

A NaOH solution has a density of 1.22 g/mL and is 20.0 wt % NaOH. What is the molality of the solution?

science chemistry

Answer 1

Answer #1

20wt%NaOH means 20g of NaOH present in 100g of solution

mass of solute( NaOH) = 20g

mass of solution = 100g

mass of solvent = mass of solution - mass of solute

= 100-20 = 80g

molar mass of NaOH = 40g/mole

molality = mass of solute * 1000/gram molar mass of NaOH * mass of solvent in g

= 20*1000/(40*80)

= 6.25m >>>>>answer

Answer 2

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