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15 November, 10:24

What volume of water should be used to dissolve 19.6 g of LiF to create a 0.320 M solution?

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Answers (1)
  1. 15 November, 13:22
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    2.4 L

    Explanation:

    Given dа ta:

    Mass of LiF = 19.6 g

    Molarity of solution = 0.320 M

    Volume of water used = ?

    Solution:

    Number of moles = mass/molar mass

    Number of moles = 19.6 g / 26 g/mol

    Number of moles = 0.75 mol

    Volume required:

    Molarity = number of moles / volume in L

    0.320 M = 0.75 mol / volume in L

    Volume in L = 0.75 mol / 0.320 M

    M = mol/L

    Volume in L = 2.4 L
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