1.计算题- (共1题)

(1)废铁锅片中铁单质的质量分数为 。
(2)所得溶液中所含溶质的化学式为 ,请计算溶液中硫酸铁的质量为 g(请写出计算过程)。
2.单选题- (共7题)
| 甲 | 乙 | 丙 |
空气 | 剧烈燃烧 | 变黑 | 变黑 |
氧气 | 更剧烈燃烧 | 变黑 | 剧烈燃烧 |
据以上信息,这三种金属的活动性由强到弱的顺序是( )
A.甲>丙>乙 | B.甲>乙>丙 | C.乙>丙>甲 | D.丙>乙>甲 |
A.常温下所有金属都是银白色的固体 |
B.在空气中灼烧铜丝,其表面会变黑 |
C.铜、银等金属具有良好的导电性 |
D.埋在潮湿、疏松、透气的酸性土壤中的铸铁管容易被腐蚀 |
A.海水中溶有大量的盐 |
B.人类从海水中提取用途广泛的金属镁 |
C.海底蕴藏丰富的煤、石油,没有天然气和“可燃冰” |
D.海底蕴藏着多金属结核,也称锰结核 |

A.20 ℃时,A试管中的溶液一定是饱和溶液 |
B.20 ℃时,B试管中的溶液一定是不饱和溶液 |
C.图2中表示甲物质的溶解度曲线的是“b” |
D.要使A试管中剩余的固体继续溶解可采用的方法是升高温度或增加溶剂 |
3.选择题- (共8题)
Japanese students work very hard but many are unhappy. They feel heavy pressures from their parents. Most students are always told to study harder and better so that they can live a wonderful life in the future. Though this may be a good idea for those very bright students, it can have terrible results for many students who are not gifted (有天赋的) enough. Many of them have tried very hard at school but have failed in the exams and have their parents lose hope. These students feel sad and they don't want to go to school anymore. They easily become dropouts.
It is surprising that though most Japanese parents are worried about their children, they do not help them in any way. Many parents feel that they are not able to help their children and that it is the teachers' job to help their children. To make matters worse, a lot of parents send their children to those schools opening in evenings or on weekends—they only help the students to pass their exams and never teach them how to understand life and the world.
Many Japanese schools usually have rules about everything, from the students' hair to their clothes and things in their schoolbags. Many child psychologists now think that such strict rules are harmful to the feelings of the students. Almost 40% of the students said that no one had taught them how to get on with others, how to tell right from wrong, or how to show love and care for others, even for their parents.
物质 | A | B | C | D |
反应前质量/g | 1.7 | 2.2 | 7.9 | 0.9 |
反应后质量/g | 待测 | 6.6 | 0 | 2.7 |
则反应后A的质量为{#blank#}1{#/blank#};
该反应中B和D两种物质变化的质量比为{#blank#}2{#/blank#}.
①My school looks similar from the one in the picture.
②They reach for excellence, not just in classroom achievements also in the development of character.
③Next to the table is her books which she read the night before.
④There is a serious competition for a place at university.
⑤Pupils have to repeat after the teacher again.
⑥They live in a society which education is very important.
⑦She gets home at midnight and falls asleep, completely exhausting.
⑧They continue their commitment to being their best at all time.
⑨I felt too shy that I didn't dare to say anything before the class.
⑩I had to go to school without breakfast in hurry.
①My school looks similar from the one in the picture.
②They reach for excellence, not just in classroom achievements also in the development of character.
③Next to the table is her books which she read the night before.
④There is a serious competition for a place at university.
⑤Pupils have to repeat after the teacher again.
⑥They live in a society which education is very important.
⑦She gets home at midnight and falls asleep, completely exhausting.
⑧They continue their commitment to being their best at all time.
⑨I felt too shy that I didn't dare to say anything before the class.
⑩I had to go to school without breakfast in hurry.
4.填空题- (共2题)

(1)一周后观察到编号为_________的试管中的铁钉锈蚀严重。
(2)常温下,铁锈蚀是铁跟______和_______(用化学式表示)等物质相互作用的结果。
(3)如何防止家庭中常用的铁制品生锈?简单易行的方法是 (列举一种方法即可)。
(1)熟石灰属于 (填“酸”、“碱”或“盐”)。用熟石灰处理硫酸厂废水中的硫酸,其化学方程式为 。
(2)熟石灰的溶解度曲线如下图所示,30℃时,将1g熟石灰加入100g水中充分搅拌、过滤,若不计溶液损失,得到溶液的质量是 g。将该溶液降温到20℃,溶液中溶质的质量分数将 (填序号)。

A.不变 B.增大 C.减小
5.实验题- (共1题)
NaCl + NH3 + CO2 + H2O = NaHCO3↓+ NH4Cl 。
【提出问题】能否在实验室模拟“侯氏制碱法”制取NaHCO3的过程呢?
【实验验证】如下图是该学习小组进行模拟实验时所用到的部分主要装置和药品。

请回答下列问题:
⑴ 检验A装置气密性的方法是:塞紧带长颈漏斗的橡胶塞,夹紧弹簧夹后,从漏斗注入一定量的水,使漏斗内的水面高于试管内的水面,停止加水后,若 ,说明装置不漏气。
⑵该实验中用B装置制取的气体是 (填化学式),B装置中盛装浓氨水的仪器名称为 ,本实验中使用该仪器的优点是 。
⑶D是连接在装置A与装置C之间的气体净化装置,进气口是 (填a或b),D的作用是除去HCl气体,反应的化学方程式为 。
⑷实验时先向饱和NaCl溶液中通入较多的NH3(溶液显碱性),再通入足量的CO2,其原因是 (填写序号)。
① 使CO2更易被吸收 ② NH3比CO2更易制取 ③ CO2的密度比NH3大
⑸用 的方法将生成的NaHCO3晶体从混合物中分离出来。
【得出结论】利用“侯氏制碱法”在实验室可以制取NaHCO3 。
-
【1】题量占比
计算题:(1道)
单选题:(7道)
选择题:(8道)
填空题:(2道)
实验题:(1道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:7
7星难题:0
8星难题:0
9星难题:1