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15 October, 15:38

The molecular weight of potassium ferricyanide is 329.24 grams/mol. How would you make 1 liter of a 500mM potassium ferricyanide solution?

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  1. 15 October, 15:47
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    w = 164.62 g

    Explanation:

    molarity of a solution is given as -

    Molarity (M) = (w / m) / V (in L)

    where,

    m = molecular mass,

    w = given mass,

    V = volume of solution,

    From the question,

    M = 500 mM = 0.5 M

    (since, 1 mM = 1 / 100 M)

    As we know, the molecular mass of potassium ferricyanide = 329.24 g / mol

    V = vol. of solution = 1 L

    w = ?

    To find the value of w, using the above formula, and putting the respected values,

    Molarity (M) = (w / m) / V (in L)

    0.5 = (w / 329.24) / 1 L

    w = 164.62 g
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