find the concentration iron (III) thiocyanate ion in stock solution

Concentration iron(III) nitrate [Fe(NO3)3](M) Color of iron(III) nitrate yellow Concentration potassium thiocyanate [KSCN] (M) 0.00200 Color of potassium thiocyanate Volume iron(Iii) nitrate ( mL ) Volume potassium thiocyanate (mL) Volume DI water (mL) colorless Concentration iron(III) thiocyanate ion in stock solution [FeSCN2+](M) Color of stock solution red-orange Diluted solutions