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Calculate the molality of a solution pre...

Calculate the molality of a solution prepared by dissolving 10.5g of NaCl is 250 g of `H_(2)O`.

Text Solution

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Molality`(m)=(n(mol))/(w(kg))=((10.5g//58.44" g "mol^(-1)))/((250g//1000g" "kg^(-1)))=0.719" mol "kg^(-1)`
We report this molality as 0.719 m NaCl solution.
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