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A solution containing 1.15 mol benzene dissolved in carbon tetrachloride has a concentration of 0.86 m. How many kilograms of carbon tetrachloride must the solution contain?

Respuesta :

JavierCollante
Molality (m)= moles solute/ kg of solvent

In this case,

0.86 m=  1.15 moles of benzene/ Kg of carbon tetrachloride

kg of CCl4= 1.15 mole/ 0.86 m= 1.34 Kg

Answer: The mass of carbon tetrachloride must be 1.34 kg.

Explanation:

Molality is defined as the number of moles of a substance present in a 1 kilogram of a solution.

Mathematically,

[tex]Molality=\frac{\text{Number of moles of substance}}{\text{Mass of solution (is kg)}}[/tex]

We are given:

Molality of a solution = 0.86 m

Number of moles of substance = 1.15 mol

Putting values in above equation, we get:

[tex]0.86=\frac{1.15mol}{\text{Mass of solution (is kg)}}\\\\\text{Mass of the solution}=1.34kg[/tex]

Hence, the mass of carbon tetrachloride must be 1.34 kg.

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