- Substance Ka H So4 Hio3 H C O4 H So3 Hcio H3po4 Hno Substance Baco3 Caco3 Cuco3 Pbco3 Mgco3 Nico3 Znco3 Very Large 1 0 1 (207.72 KiB) Viewed 13 times
Substance Ka H₂SO4 HIO3 H₂C₂O4 H₂SO3 HCIO₂ H3PO4 HNO₂ Substance BaCO3 CaCO3 CUCO3 PbCO3 MgCO3 NiCO3 ZnCO3 Very large 1.0 x 10-² 1.6 x 10-¹ 5.6 x 10-² 5.4 x 10-5 1.4 x 10-² 6.5 x 10-8 1.1 x 10-² 7.2 x 10-³ 6.3 x 10-8 4.2 x 10-¹3 7.1 x 10-4 Ksp 2.0 x 10-⁹ 3.3 x 10-⁹ 3 x 10-12 7.4 x 10-¹4 3.5 x 10-8 1.3 x 10-7 1.0 x 10-10 Substance HF HCOOH CH3COOH H₂CO3 H₂S HOCI HCN Substance BaF₂ CaF₂ PbF₂ MgF₂ CuCl PbCl₂ AgCl Ka 6.8 x 10-4 1.8 x 10-4 1.8 x 10-5 4.5 x 10-7 4.7 x 10-¹1 9 x 10-8 1 x 10-¹7 2.9 x 10-8 6.2 x 10-¹0 Ksp 1.5 x 10-6 3.2 x 10-11 3.6 x 10-8 7.4 x 10-⁹ 1.9 x 10-7 1.7 x 10-5 1.8 x 10-¹0 Substance Kb CH3NH2 CH3CH2NH2 NH3 HONH2 C5H5N CoH5NH2 Substance Ca(OH)2 Cu(OH)2 Fe(OH)2 Fe(OH)3 Mg(OH)2 Ni(OH)2 Zn(OH)2 4.4 x 10-4 4.3 x 10-4 1.8 x 10-5 1.8 x 10-7 1.7 x 10-⁹ 4.0 x 10-¹0 Ksp 6.5 x 10-6 2.2 x 10-20 4.1 x 10-15 1.6 x 10-39 6.3 x 10-¹0 6 x 10-16 3 x 10-16 Substance Ag(CN)₂ Ag(NH3)2* Ag(S₂03)2³ Al(OH)4 CO(OH)4²- Cr(OH)4 Cu(NH3)4²2+ Fe(CN) 64 Fe(CN)6³- Ni(NH3)²+ 2+ Pb(OH)3 2+ Zn(NH3)4²+ Zn(OH)4²- Substance CA3(PO4)2 Mg3(PO4)2 Ag3PO4 BaSO4 CaSO4 PbSO4 Ag₂SO4 Kf 3.0 x 102⁰ 1.7 x 107 4.7 x 10¹3 3 x 1033 5 x 10⁹ 8.0 x 102⁹ 5.6 x 10¹¹ 3 x 1035 4.0 x 1043 2.0 x 108 8 x 10¹3 7.8 x 108 3 x 1015 Ksp -29 1.2 x 10 5.2 x 10-24 2.6 x 10 1.1 x 10-¹0 2.4 x 10-5 -18 1.6 x 10-8 1.5 x 10-5
1) K overall for sulfide test 0/1 points Look up the formation constant, Kf on CHEM_III_Eqn_Sheet and using the Ksp of zinc sulfide as 2.0 x 10-25, calculate the overall equilibrium constant for the reaction you wrote on the pre-lab for the reaction forming zinc sulfide and ammonia from zinc complex and sulfide ions (see "sulfide test - zinc complex") Overall Equilibrium Constant Evaluate Check your calculation again
2) Sulfide test - zinc complex 1/1 points Write the reaction (including phase labels) where the zinc complex and sulfide ions react to form zinc sulfide and ammonia. Note that uncomplexed zinc ions would form precipitates with other ions in solution, but only zinc sulfide is insoluble enough to precipitate with the complex present. Reactants Coefficient Formula [Zn(NH3)4] 2+ (aq) Coefficient Formula S 2-- (aq) 回 Add Reactant Products Formular ZnS (s) Formula NH3 (aq) → 0 Preview: [Zn(NH3)4]²+ (aq) + S² (aq) →→→ ZnS(s) + 4 NH₂ (aq) Evaluate Correct! Coefficient Coefficient 4 Add Product Charge Charge- 0