5. 有A ~ F六種0.10M之水溶液
(A)HCl (B)NaOH (C)CH3COONa(CH3COOH之)
(D)Na2HPO4(H3PO4之,,)
(E)NaHSO4(H2SO4之)
(F)Na2CO3(H2CO3之,)
試回答下列問題:(log2=0.30,log3=0.48)
(1)計算E溶液的pH值