Question

The empirical formula for the Brilliant Blue dye is: C37H34N2O9S3Na2 and the formula weight are 792.86g/mol. How would you prepare a 5.25 x 10-6 M solution of Brilliant Blue dye. How many grams of the dye you need to add to a 1.00 L of water to make this solution.

Even though I have no idea what I am doing, I attempted to do the problem:

(5.25 x10^-6/1L)(1L/1000mL)(792.86 g/1 mol)= 4.2 x10^-6 g

Am I correct?

Answer 1

That is the answer for preparing 1mL.
did you intend on that?

Answer 2

(5.25 x10^-6 moles)(792.86 g/1 mol)=????? <= 3 significant figures.

M=moles/L

They question tells you that you need 1 L. So, in this case M=moles. The other conversion isn’t required to answer this problem.

Answer 3

My mistake, I did not intend for the other conversion. Thank you guys very much!