3. 下列反應均趨向右進行： (1) CH3COOH＋HS－→ CH3COO－＋H2S (2) H3O＋＋H2PO4－→ H2O＋H3PO4 (3) H2S＋OH－→  H2O＋HS－ (4) H3PO4＋CH3COO－→ CH3COOH＋H2PO4－。 根據上述反應分析比較，所有布－洛學說中的鹼強度大小順序為何？
(A)H3O＋＞H3PO4＞CH3COOH＞H2S＞H2O
(B)H2PO4－＞CH3COO－＞OH－＞H2O＞HS－
(C)H3PO4＞H2S＞H3O＋＞CH3COOH＞H2O
(D)OH－＞HS－＞CH3COO－＞H2PO4－＞H2O
(E)CH3COOH＞H3O＋＞H3PO4＞H2S＞H2O