A beaker contains 450 g of water if 9.2g of calcium fluoride is added what is the molality concentration of the solution

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20-06-2017
Chemistry

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A beaker contains 450 g of water if 9.2g of calcium fluoride is added what is the molality concentration of the solution

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deyaadrianaorrsph deyaadrianaorrsph · Answer 1 · 2017-06-20T23:45:31+02:00

deyaadrianaorrsph deyaadrianaorrsph

20-06-2017

molality = moles of solute/ kg of solvent

You need to switch the units you have to fit the formula so

450 g = .45 kg

9.2 g/ 40.078 g = .2296 moles of calcium
.2296 moles/ .45 kg = .51 m

The concentration is .51 m

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