高新区2019级二诊试题答案
高新区2019级二诊试
化学试题答案
第Ⅰ卷（选择题共42分）
一、选择题（本题包括14小题，每小题3分，共42分。每小题仅有一个选项符合题意）
1-5CCBDC 6-10 DCADC 11-14 BDAA
第II卷（非选择题共48分）
二、（完成下列各题，本题包括1个小题，共8分）
15. （每空1分，共8分）
（1）面粉；食盐
（2）钙/Ca
（3）塑料盆
（4）吸附
（5）乳化
（6）D
（7）24:3
三、（完成下列各题，本题包括1个小题，共10分）
16 .（第（1）-（3）小题每空1分，（4）小题6分，共10分）
115 最外层电子数依次递增
NH3.H2O NO
18克(过程略)
四、（完成下列各题，本题包括2个小题，共17分）
17. （方程式2分，其它每空1分，共9分）（l）锥形瓶；
（2）CaCO3 + 2HCl = CaC12 + H2O+ CO2↑
（3）将带火星的木条放在集气瓶口，若木条复燃，则说明氧气己收集满氢气
（4）伸入液面以下
（5）甲碱石灰中的氢氧化钠能与二氧化碳反应，故无法干燥二氧化碳
（6）a 18. （（1）（2）小问每空2分，其它每空1分，共8分）
(1) Fe2O3 +3H2SO4=Fe2 (SO4)3+3H2O
(2)增大硫酸的浓度升高温度将烧渣粉碎
（3点中任意2点）
(3)①H2O
②铁消耗过量的硫酸，溶液酸性减弱
（4）纯净物
（5）降温结晶
五、（本题包括1小题，共13分）
19.（方程式2分，其它每空1分，共13分）
【得出结论1】
C>B>A
【实验探究2】无红
NaOH+HCl=NaCl+H2O 【得出结论2】
氢离子和氢氧根离子结合生成水分子
D
【交流与反思】
HCl
NaCl、NaHCO3（2分）
【得出结论3】A，B
【结论与反思】
D
1*10^-6
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