Based on reaction kinetics, which of the following pairs of reactions and reaction rate equations represent elementary reactions? You may choose more than one reaction.
Ti + 2Cl2 = TiCl4 Rate = k[Ti][Cl2]
2SO2 + O2 = 2SO3 Rate = k[O2][SO2]2
Na2S + CuSO4 = CuS + Na2SO4 Rate = k[CuSO4]
COCl2 = CO + Cl2 Rate = k[COCl2]
HCOOH = CO2 + H2 Rate = k[HCOOH]
Pb2+ + 2Cl- = PbCl2 Rate = k[Pb2+][Cl-]2