• 2021-04-14
    【单选题】符号Kb(HS-)是下列哪个反应的质子转移平衡常数?
    A. HS- + OH- = S2- + H2O
    B. HS- +H2O = S2- +H3O+
    C. HS- + H2O = H2S + OH-
    D. HS- + H3O+ = H2S + H2O


  • HS- +H2O = S2- +H3O+

    内容

    • 0

      H3O+、H2S的共轭碱分别是 A: OH-,S2- B: H2O,HS- C: H2O,S2- D: OH-,,HS-

    • 1

      H3O+、H2S的共轭碱分别是 A: OH-,S2- B: H2O,HS- C: H2O,S2- D: OH-,,HS-

    • 2

      对于平面3节点三角形单元,单元尺寸为h,则位移的误差是____量级,应变的误差是____量级,应变能的误差是____量级。 A: $O(h^2),O(h^2),O(h^4)$ B: $O(h^2),O(h),O(h^2)$ C: $O(h^3),O(h),O(h^2)$ D: $O(h^3),O(h^2),O(h^4)$

    • 3

      在Na2S溶液中,其质子等衡式是 A: [OH-]=2[H2S]+[HS-]+[H+] B: [H+]=2[H2S]+[HS-]-[OH-] C: [H+]=[OH-]+[HS-]-2[H2S] D: [H+]=[OH-]-[HS-]-2[H2S]

    • 4

      Na2S水溶液中的质子条件式是 A: [H+]+2[H2S]+[HS-]=[OH-] B: [H+]+2[H2S]=[HS-]+[OH-] C: [H+]+[H2S]+[HS-]=[OH-]+[Na+] D: [H+]+[H2S]=2[S22-]+[HS-]+[OH-]