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10 February, 06:57

How many grams of CaF2 are present in 1.25 L of a 0.15 M solution of CaF2? How do I find the grams I am confused on that part?

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  1. 10 February, 08:56
    0
    Mass = 14.64 g

    Explanation:

    Given dа ta:

    Volume of solution = 1.25 L

    Molarity of Solution = 0.15 M

    Mass of CaF₂ = ?

    Solution:

    Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

    Formula:

    Molarity = number of moles of solute / L of solution

    We will calculate the number of moles of CaF₂ and then determine the mass by using number of moles.

    0.15 M = number of moles of solute / 1.25 L

    number of moles of solute = 0.15 M * 1.25 L

    number of moles of solute = 0.1875 mol/L * L

    number of moles of solute = 0.1875 mol

    Mass in gram:

    Mass = number of moles * molar mass

    Mass = 0.1875 mol * 78.07 g/mol

    Mass = 14.64 g
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