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

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