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What is the molality of a solution consisting of 2.66 mL of carbon tetrachloride (CCl₄ ; d = 1.59 g/mL) in 76.5 mL of methylene chloride (CH₂ Cl₂ ; d = 1.33 g/mL)?

Respuesta :

The  molality of the solution is 4.372m .

What do you mean by molality?

Molality is the no of moles present in one Kg solution.

Molality = no of moles / mass of

.                                      Solution (kg)

SI unit of molality is m.

We have given ,

Volume of CCl4 →2.66ml

Density of ccl4→1.60g/ mol

Volume of CH2Cl2→76.5ml

Density of CH2Cl2 →1.33g/ mol

Mass of CCl4→4.25 g

Mass of CH2Cl2 →100g( approx)

Mass of the solution→104.25g

molar mass of the solution→238.4g/mol

 Molality = 104.25/1000×38.4

Molality → 4.37 m

Hence, the molality of the solution will be 4.37m

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