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10 January, 18:28

How many deciliter a of a. 88M Lif solution be made using 25.5 cg Lif? Lif molar mass = 25.94 g/mol

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  1. 10 January, 20:53
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    0.112 deciliter

    Explanation: Molarity of a solution shows the amount of solute in moles contained in a liter of solution. Therefore; Molarity = Number of moles : Volume of solvent in liters

    In this case we are given;

    Molarity of LiF as 0.88 M

    Mass of LiF as 25.5 cg

    but, 1 g = 100 cg

    Therefore, mass of LiF = 0.255 g

    Molar mass of LiF = 25.94 g/mol

    We are required to calculate the volume of LiF in deciliter

    Step 1: Determine the number of moles of LiF

    Moles = Mass : Molar mass

    = 0.255 g : 25.94 g/mol

    = 0.00983 mole

    Step 2: Determine the volume of LiF

    Molarity = Moles : Volume

    Rearranging the formula;

    Volume = Moles : Molarity

    Volume of LiF = 0.00983 mole : 0.88 moles/liter

    = 0.0112 L

    But, 1 L = 10 DL

    Therefore, Volume = 0.112 DL

    Thus, the volume of LiF is 0.112 deciliter
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