A buffer prepared by dissolving oxalic acid dihydrate (H,co, 2H,0) and disodium oxalate (Na,C,0,) in 1.00 L of water has a pH of 5.110. How many grams of oxalic acid dihydrate (MW = 126.07 g/mol) and disodium oxalate (MW = 133.99 g/mol) were required to prepare this buffer if the total oxalate concentration is 0.188 M? Oxalic acid has pk, values of 1.250 (pK) and 4.266 (pK). 3.4 mass of H,C,0, - 2H,0 Incorrect 21 mass of Na,C,0, = Inctrsect