題組內容

三、H3PO4 (98.00 g/mol), NaH2PO4 (119.98 g/mol), Na2HPO4 (141.96 g/mol), Na3PO4 (163.94 g/mol), pK1 = 2.15, pK2 = 7.20, pK3 = 12.35

⑵各需該兩種物質鹼：酸之莫耳濃度比為多少？（10 分）