How many grams of nano3 would you add to 500g of h2o in order to prepare a solution that is 0.500 molal in nano3?

1 answer:

4 0

When concentration levels are defined in molality, they indicate moles of solute per kilogram of solvent. Having the solvent's mass, which consists of water, allows us to find the moles of NaNO3 solute.

With 0.5 m being equal to x moles of NaNO3 divided by 0.5 kg of water, we calculate x = 0.25 moles of NaNO3.

Given that the molar mass of NaNO3 is 85 g/mol, the mass required is

0.25 moles * 85 g/mol = 21.25 grams NaNO3 needed.

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