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Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is `0.040`.

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To calculate the molarity of a solution of ethanol in water where the mole fraction of ethanol is 0.040, we can follow these steps: ### Step 1: Understand the definition of mole fraction The mole fraction (X) of a component in a solution is defined as the ratio of the number of moles of that component to the total number of moles of all components in the solution. ### Step 2: Set up the equation for mole fraction Let \( n \) be the number of moles of ethanol. The mole fraction of ethanol (X_ethanol) is given by the formula: \[ ...
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Knowledge Check

  • The relative lowering of vapour pressure of a solvent by the addition of a solute is : 1) proportional to the molarity of the solution 2) proportional to the molality of the solution 3) equal to the mole fraction of the solute 4) equal to the mole fraction of the solvent.

    A
    proportional to the molarity of the solution
    B
    proportional to the molality of the solution
    C
    equal to the mole fraction of the solute
    D
    equal to the mole fraction of the solvent.

  • What will be the mole fraction of ethanol in a sample of spirit containing 85% ethanol by mass ?

    A
    `0.69`
    B
    `0.82`
    C
    `0.85`
    D
    `0.60`

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