Which of the following solutions represents a good buffer system? a solution that is 0. 10 mol L-1 HF and 0. 10 mol L-1 CH3COONa a solution that is 0. 10 mol L-1 HCl and 0. 10 mol L-1 NH4 a solution that is 0. 10 mol L-1 CH3COOH and 0. 10 mol L-1 CH3COOLi a solution that is 0. 10 mol L-1 NaOH and 0. 10 mol L-1 KOH a solution that is 0. 10 mol L-1 HCl and 0. 10 mol L-1 KCl.