11、己知反应 NH3H20=NH4+OH,K9=1.8x105, Mn2+2NH3:H20=Mn(OH2+2NH4,K2=1.7x102, 则Mn2++20H一Mn(OH2的K3= ,K(Mn(OH)2)= Balancing the following chemical equations(three equations,2 points for each one, 6 points in total) 1、 Mn2++ PbO2+H'MnO4+Pb2+H2O 2、 SnC12 Hg2C12 →SnCl4+Hg 3、 Cr042-+ CN →CNO+Cr(OH3 Write out the definition of the following items(three questions,2 points for each one, 6 points in total) 1.AGm:the Gibbs function change that occurs in the formation of Imol of a substance B in its standard state from the reference forms of its element in their stable states at temperature T 2.E:electrode potential at standard condition 3.△Hme 第5页11、已知反应 NH3·H2O NH4 ++OH- ，K =1.8×10-5， Mn2++2NH3·H2O Mn(OH)2+2NH4 +，K =1.7×102， 则 Mn2++2OH- Mn(OH)2 的 K =________，K (Mn(OH)2)=_____________。 四、Balancing the following chemical equations (three equations, 2 points for each one, 6 points in total) 1、 Mn2+ + PbO2 + H+ → MnO4 －+ Pb2+ + H2O 2、 SnC12 + Hg2C12 → SnCl4 + Hg 3、 CrO4 2-+ CN- → CNO- + Cr(OH)3 五、Write out the definition of the following items (three questions, 2 points for each one, 6 points in total) 1. ΔfGm Θ: the Gibbs function change that occurs in the formation of 1mol of a substance B in its standard state from the reference forms of its element in their stable states at temperature T 2．E(ox/red) Θ: electrode potential at standard condition 3. ΔrHm Θ: 第 5 页