广西南宁市第二中学2018_2019学年高一化学上学期期中试题(扫描版).doc

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1、 1 -广西南宁市第二中学 2018-2019 学年高一化学上学期期中试题(扫描版)- 2 - 3 - 4 - 5 -20182019 学年度上学期高一化学段考试题参考答案及评分说明选择题(每题 3 分,共 45 分)16. (每空 2 分,共 20 分)(1)0.5mol (2)4:5 (3)5mol/L (不写单位扣 1 分) (4)8:13(1) 4 10 - 4 1 3(全对得2分) 正确标出双线桥(2分) 电子转移总数 (2分) 氧化性和酸性(2分,对一个得1分)(2) H 2C2O4, 0.002mol, (各 2 分,共 4 分)17.(每空 2 分,共 12 分)过滤 B 碘

2、在四氯化碳中的溶解度远大于在水中的溶解度,而且四氯化碳与水不互溶,出现分层(合理均给分) Cl 2+2NaI = I2+ 2NaCl (写离子方程式也给分) 下层液体从下口流出,上层液体从上口倒出 (5)C 18 (每空 2 分,共 12 分)(1)5.4; (2)10; 500mL 容量瓶(容量瓶没标容量不给分)(3)(顺序错均不得分)(4)偏高(5)重新配制。19(第 1 小题 7 分,第 2 小题 4 分,共 11 分)(1)混合气体的平均摩尔质量=22.40.821=18.4g/mol (4 分) 题号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15答案 C D A B D B或D都给分C A 选什么都给分B C B C B B- 6 -用十字交叉法或列方程解得 VN2:VCH4=1:4 (3 分)(2)(4 分)从表中数据可知,丙实验金属过量,盐酸完全反应,则n(HCl)= 2n(H2)= 20.336/22.4=0.03mol (2 分) 故 c(HCl)=1mol/L (2 分)

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