2014福建省质检化学试题答案【word】(3)

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    冷的浓硫酸能使铝钝化                                             (2分)
    
 (2)CH3COOCH2CH3 + H2O  CH3COOH + CH3CH2OH            (3分)
    ① HCO3- + H+ = CO2↑+ H2O (或其它合理答案)                   (3分)
       ② 2NH3 (g) + 3CuO(s) = 3Cu(s) + N2(g)+ 3H2O(l)  △H = -294 kJ·mol-1   (3分)
    ③ b                                                              (2分)
24.(16分)
 (1)① A                                                             (2分)
       ② CaSO4 + CO32-  CaCO3 + SO42-                               (3分)
    ③ 2Fe3+ + Fe = 3Fe2+                                              (3分)
     Sn4+                                                           (2分)
       ④ 随溶液pH增大,平衡 H3R  H2R- + H+向右移动,
  所以,H3R的百分含量减小                                        (2分)
    H2R-                                                                                             (2分)
 (2)b                                                                 (2分)
25. (15分)
 (1) B、D                                                            (2分)(2) Cl2+ 2NaOH = NaClO + NaCl + H2O                                 (3分)
(3) 取一定量锥形瓶内混合溶液,加入适量的H2O2溶液后,滴加2~3滴酚酞试液,用 0.100mol·L-1盐酸滴定,重复上述操作2~3次                             (2分)
 (4) B                                                                (2分)
  如果次氯酸钠溶液装在烧瓶中,反应生成的水合肼会被次氯酸钠氧化           (2分)
 (5) NaHCO3会与滴定过程中产生的HI反应       
31. (13分)
 (1) [Ar]3d54s1或1s22s22p63s23p63d54s1                              (2分)
 (2) O   Si                                                 (各1分,共2分)(3) 乙醇分子间存在氢键,而乙醛分子间不存在氢键                       (2分)

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