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What mass of water is needed to dissolve 292.5g of NaCl to produce 0.25 m aqueous solution?
Wiki User
∙ 11y ago
m (molality)=moles of solute/kg of solvent
To calculate moles of solute you convert 292.5 g of NaCl to moles of NaCl. So (292.5gNaCl)(1mole NaCl / 58.4gNaCl)= 5.0085 moles NaCl
Now plug and chug.
0.25m=5.0085moles NaCl / x
x=5.0085 moles NaCl /.25m
x=20kg
Wiki User
∙ 11y ago
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