Iron(III) ions, \({\text{F}}{{\text{e}}^{3 + }}\), react with thiocyanate ions, \({\text{SC}}{{\text{N}}^ - }\), in a reversible reaction to form a red solution. Which changes to the equilibrium will make the solution go red?

    \({\text{F}}{{\text{e}}^{3 + }}{\text{(aq)}} + {\text{SC}}{{\text{N}}^ - }{\text{(aq)}} \rightleftharpoons {{\text{[FeSCN]}}^{2 + }}{\text{(aq)}}\)     \(\Delta {H^\Theta } =  + {\rm{ve}}\)

     Yellow\(\quad \quad \quad \quad \quad \quad \quad \quad \;\)Red

I.     Increasing the temperature

II.     Adding \({\rm{FeC}}{{\rm{l}}_3}\)

III.     Adding a catalyst

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

A