Question

9.20 grams NaOH (M.W.=40) dissolved in 1000 grams of solvent. Molarity (m) of this solution is?

Answer 1

@dinisha is it MOLARITY(M) or MOLALITY(m)

Answer 2

Probably molality since we're given the mass of the solvent and no way of knowing the volume.

Molality (m) = moles of solute / kg of solvent

m = (9.20 g / 40 g/mol) / 1 kg = 0.23 m

Answer 3

the question said MOLARITY but (m) @rishavraj n @matt101

Answer 4

Molarity requires us to know the volume of solution. If the solvent is water then molality = molarity since 1 kg of water occupies 1 L. For any other solvent, we would need to know the density of the solvent in order to calculate the volume given the mass.

Answer 5

in that case the question is MOLALITY is it??
the options given are 0.50, 0.20, 0.40, 0.05, 0.02 @matt101

Answer 6

Yes and I would say the answer is 0.20 because that's closest to the answer I got above.

Answer 7

thank u :)