The copper(I) ion is precipitated using 1 M KSCN (Reaction 6). However, the solution is now contaminated with iron(III) ion from Reaction 5. The thiocyanate ion also reacts with iron(III) ion (but not iron(II) ion) to form a soluble complex, FeSCN2+ (Reaction 7). (a) Calculate the volume of 1 M KSCN necessary to react with the copper(I) ion.