What quantity (moles) of NaOH must be added to 1.0 L of 2.2 M HC2H3O2 to produce a solution buffered at pH = pKa? Ka = 1.8×10-5 1.094 mol What quantity (moles) of NaOH must be added to 1.0 L of 2.2 M HC2H3O2 to produce a solution buffered at pH = 4.00? Ka = 1.8×10-5 .702 mol What quantity (moles) of NaOH must be added to 1.0 L of 2.2 M HC2H3O2 to produce a solution buffered at pH = 5.00? Ka = 1.8×10-5