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Clearnote
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Senior High
Chemistry
為什麼E選項有電荷平衡
Chemistry
Senior High
over 1 yearago
Ching
為什麼E選項有電荷平衡
範例 弱酸的解離 已知H,S之水溶液有以下平衡: AE (HS(aq)H(aq) + HS(aq) Ka=9.0×10-8;HS(aq)H(aq)+S(aq) Ke=1.0×10-2; HO(1) H(aq) +OH(aq),則1.0M的HS(aq)中,下列各離子濃度的相關敘述,哪些正確? (A) [H]約為3.0×10-4 M(B)[H+] = [HS-] (C)質量平衡:3[H+] = [HS] + 2[S²] (D)電荷平衡:4[H+]=[HS-]+2[S²] + [OH](E)電荷平衡:[H+]=[HS¯]+2[S] + [OH]。 容 : 2 ∴ [H+]由Ka)决定 (A) Kaizka [*] Kai -8 :: [H+] = √coxka = √1x9x108 -3x10-4 M (C) [H₂S] = [H2S] + [HS]] + [S²~] (D)(E)(HH=CHS)+2[S]+[OH) HO P 粨頭~ 3
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