Zn(s)+HgO(s)+H2O(I)->Zn(OH)2(s)+Hg(I), What the reaction at positive electrode is What the reaction at negative electrode is an electrolyte that can be used is The cell digram is Please balance the following chemical equations(5 equations,2 points for each one,10 points in total) PbCl+ H20 —→ 2. B2H6(g)+H2O(1) → Ni(OH)2+ CIO 4. KMnO4+H2O2+HSO4—→ 5. Hg22++ I'(excess) Simple questions(two questions,5 points for each one,10 points in total) 1.Which element has the largest second ionization energy in the second period?Please give an explanation. 2.Try to design a simple method to separate and identify the ions from a solution containing Zn,Coand Al. Answer the following questions according to requests(4 questions,20 points in total) 1.(5 points)(1)AgCl will precipitate when 0.05mol KCl is added into 1.0L solution of 0.10 mol-L AgNO3.Supposing NH3 is present in the original system,what is the total concentration of NH,when no AgCl precipitate forms? (2)if 0.001mol KI is added into the above solution containing NH3,Agl precipitate will form or not?(suppose the volume of the solution has no change upon addition of the reagents) 2.(5 points)A reaction SbCls(g)=SbCl3(g)+Cl2(g)will occur in a 3.50L closed 第6页 Zn(s)＋HgO (s)+H2O(l) ⎯⎯→Zn(OH)2(s)+Hg(l)， What the reaction at positive electrode is____________________________；What the reaction at negative electrode is _________________________；an electrolyte that can be used is _____________. The cell digram is ______________________________. 四、Please balance the following chemical equations (5 equations, 2 points for each one, 10 points in total) 1． PbCl2＋ H2O ⎯⎯→ 2． B2H6(g)＋ H2O(l) ⎯⎯→ 3． Ni(OH)2＋ ClO- ⎯⎯→ 4． KMnO4＋ H2O2＋ H2SO4 ⎯⎯→ 2+ 5． Hg2 ＋ I- （excess） ⎯⎯→ - 五、Simple questions (two questions, 5 points for each one, 10 points in total) 1．Which element has the largest second ionization energy in the second period? Please give an explanation. 2. Try to design a simple method to separate and identify the ions from a solution containing Zn2+， 2+ 3+ Co and Al 。 六、Answer the following questions according to requests (4 questions, 20 points in total) 1．(5 points) (1) AgCl will precipitate when 0.05mol KCl is added into 1.0L solution of 0.10 mol⋅L-1 AgNO3. Supposing NH3 is present in the original system, what is the total concentration of NH3 when no AgCl precipitate forms? (2) if 0.001mol KI is added into the above solution containing NH3, AgI precipitate will form or not? (suppose the volume of the solution has no change upon addition of the reagents) 2．(5 points) A reaction SbCl5(g) SbCl3 (g) + Cl2 (g) will occur in a 3.50L closed 第 6 页