I'm a bit confused on exactly what I should be doing here. This is for an undergraduate 300 level inorganic chemistry lab.

1) Calculate the correct mass of H_{2}salen needed (MW=268.3 g/mol) to form a 1:1 complex with CuCl_{2} using 2 mL of a 0.03 *M* CuCl_{2} solution.

I think if I'm pointed in the right direction not sure what route I should to figure this out.