1.计算题- (共1题)
2Fe+3H2O；杂质不参加反应，假定每步均完全反应或吸收）。请回答有关问题：
得到如下数据：
| 装置 | B | C |
| 反应前质量 | 84.3g | 294.1g |
| 反应后质量 | 81.9g | 296.8g |
（1）请计算该赤铁矿石样品中氧化铁的质量分数。（写出计算过程）
（2）该实验还可测定组成水中各元素之间的质量关系，请用表中实验数据列式表示出水中氢、氧元素的质量比为_______________________________________________（只列式，不计算）；若玻璃管中的氧化铁没有完全反应，则求得水中氢、氧元素的质量比会__________（选填“偏大”、“偏小” 或“不变”）。
2.单选题- (共12题)
| A．该方法中包含复分解反应、分解反应、置换反应等 |
| B．物质①是Ca（OH）2溶液 |
| C．操作①是过滤 |
| D．整个过程至少有NaOH和CO2两种物质可以循环利用 |
A. 碘-127与碘-131所含质子数均为53
B. 碘-127与碘-131所含电子数相同
C. 碘-127与碘-131属于不同元素
D. 碘元素人体摄入不足或过多均会造成甲状腺肿大
A. 2MnO4—：表示2个锰酸根离子
B. Ar：表示氩气、氩元素和一个氩原子
C. 2CO2：表示2个二氧化碳分子
D. 维生素C（C6H8O6）：表示该物质由碳、氢、氧三种元素组成。
①向滤渣中加入稀盐酸，一定有气泡产生。②向滤渣中加入稀盐酸，一定有沉淀产生。
③滤渣中一定含有Ag。④滤液中一定含有Fe(NO3)2，一定不含AgNO3，可能含有Al(NO3)3。
以上说法正确的个数为
| A．0个 | B．1个 | C．2个 | D．3个 |
| A．a的溶解度大于c的溶解度 |
| B．在tl℃时，a、c两种溶液中溶质的质量分数相同 |
| C．c的不饱和溶液由t2℃降温至t1℃时，变成饱和溶液 |
| D．要从b溶液中得到b，通常可采用蒸发溶剂结晶的方法 |
| A．用水可以灭火，是因为降低了可燃物的着火点 |
| B．任何可燃性气体跟空气充分混合后遇火时都有可能发生爆炸，因此当氢气、天然气、煤气等发生泄漏时应杜绝一切火源、火星，以防发生爆炸。 |
| C．锅里的油着火时可用锅盖盖灭，是因为隔绝了氧气 |
| D．镁可以在二氧化碳中燃烧，说明燃烧不一定要有氧气参与 |
3.选择题- (共15题)
通读全文，根据对短文的理解，选择正确的答案填空。
I can't remember when I started collecting litter. But it was when I got tired of 1 litter nearby that I realized no one else was going to pick it up.
I live near a forest in Ohio, America. I can walk there 2 three minutes. I used to love going there to play with my dog. But one day there was 3 much litter there that I became very unhappy. I decided to clean up the forest, and I wanted to 4 happy when I went again. I made my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes 5 I started to pick up litter, my bag was full! There were cans, bottles, broken glass and newspapers in it.
From then on, I 6 to the forest four times a year to pick up litter. I often stay there for three hours. It makes me feel 7 to do something for the environment. After each trip, I look through all the litter that I've collected. If 8 of it is recyclable（可回收利用的）, I'll keep it. I can't understand why people drop litter. But I will keep on picking it up 9they stop dropping it. I know I am only doing a small bit 10 the earth, but I still think it is important.
通读全文，根据对短文的理解，选择正确的答案填空。
I can't remember when I started collecting litter. But it was when I got tired of 1 litter nearby that I realized no one else was going to pick it up.
I live near a forest in Ohio, America. I can walk there 2 three minutes. I used to love going there to play with my dog. But one day there was 3 much litter there that I became very unhappy. I decided to clean up the forest, and I wanted to 4 happy when I went again. I made my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes 5 I started to pick up litter, my bag was full! There were cans, bottles, broken glass and newspapers in it.
From then on, I 6 to the forest four times a year to pick up litter. I often stay there for three hours. It makes me feel 7 to do something for the environment. After each trip, I look through all the litter that I've collected. If 8 of it is recyclable（可回收利用的）, I'll keep it. I can't understand why people drop litter. But I will keep on picking it up 9they stop dropping it. I know I am only doing a small bit 10 the earth, but I still think it is important.
In the factory, there are 100 workers. About _____ of workers are girls. So forty workers are boys.
根据短文内容，选择正确答案。
Every four years, the greatest athletes from all over the world get together in one city to take part in the world sports meeting—the Olympic Games. The holy flame (圣火) is carried from one place to the next. In 2008, the holy flame was carried to Beijing, the capital of China.
When Beijing was chosen as the host city to hold the Olympic Games in 2008, all the Chinese people were very happy, excited and proud. They showed their excitement in different ways when they heard the news. Some people cheered, jumped and shouted.
In Beijing we built a new Olympic village with hotels for athletes and stadiums for matches.
"One World, One Dream" is our slogan for the 29th Olympics. It expresses the wishes of 1.3 billion Chinese people for a peaceful and better world tomorrow.
根据表格内容，回答问题。
|
Paul
|
I have been a volunteer as a French teacher for three months and it was a great experience to teach French. I really enjoyed it and I also improved my French. |
|
Helen
|
During my college days, I joined a group called ROS (Reaching Out Society). We provide children and older people with food. It feels great to help other people. And now, I often give food to the homeless people in the street. |
|
Mike
|
I'm volunteering at an animal shelter (动物收容所) that's just for cats. I feed the cats and play with them. It's very fun. I was also volunteer at a hospital for a little more than 2 years. I answered phone calls, looked after patients and helped nurses. I did some cleaning too. |
|
Marian
|
I did volunteer work to graduate from high school. It was a requirement(资格). I volunteered at a school for disabled kids. I played basketball and other sports with them and served food and drinks. It was actually pretty cool. If I weren't so busy now, I'd do it again. |
4.多选题- (共1题)
A. 高氯精是有机高分子化合物
B. 高氯精中C、O、N、Cl的原子个数比为1：l：1：1
C. 高氯精中氯元素的质量分数为25％
D. 高氯精中C、N两种元素的质量比为12：14
5.填空题- (共4题)
（1）天然水中溶解的气体主要有____ ___，利用_____ __方法可以将水中溶解的气体除去。
（2）含有较多_ ___ ___的水称为硬水，实验室中将硬水软化常用 操作。
（3）区分软水和硬水常用的物质是 。
（4）保护水环境、珍爱水资源，是每个公民应尽的责任和义务。下列做法有利于保护水资源的是 (填序号)。
| A．大量使用化肥农药 | B．工业废水处理达标后排放 |
| C．使用含磷洗衣粉 | D．生活污水直接排放 |
(1)配制100g质量分数为8％的氢氧化钠溶液。
①计算：需要氢氧化钠固体的质量为 g，水的体积为 mL(水的密度近似看作1g／cm3)。
②称量：调节托盘天平平衡，将一个烧杯放在托盘天平的 盘，称量其质量。然后按需要添加砝码、移动游码，再将氢氧化钠固体加入烧杯中，直至天平平衡。该步骤中用烧杯而不用纸称量氢氧化钠的原因是 。
③溶解：用量筒量取所需的水，倒入盛有氢氧化钠固体的烧杯里，搅拌，使其溶解，并冷却至室温。
④把配好的溶液装入试剂瓶，塞好橡皮塞并贴上标签。
(2)某兴趣小组同学为证明NaOH溶液与稀盐酸发生了中和反应，从不同角度设计了如下实验方案，并进行实验。
（实验方案）
方案一：先用pH试纸测定NaOH溶液的pH，再滴加盐酸，并不断振荡溶液，同时测定混合溶液的pH，如果测得的pH逐渐变小且最终小至小于7，则证明NaOH溶液与稀盐酸发生了化学反应。
①用pH试纸测定NaOH溶液pH时，正确的操作是： 。
②简述强调“测得的pH小于7”的理由： 。
方案二：化学反应中通常伴随有能量的变化，可借助反应前后的温度变化来判断反应的发生。如果NaOH溶液与稀盐酸混合前后温度有变化，则证明发生了化学反应。该组同学在没使用温度计的情况下，通过下图所示装置完成了实验。则该组同学根据
(1) C属于 （填“酸”、“碱”或“盐”）；
D的用途 （只举一例）。
(2) 写出A与B反应的化学方程式 ,
(3) 写出E→F反应的化学方程式
(4) 写出I分解反应的化学方程式
（1）硫铁矿是 物（填“纯净”或“混合”）。
（2）写出碳与Fe3O4反应的化学方程式 .
（3）酸浸过滤后滤液中的溶质主要是 。
（4）反应Ⅰ的反应温度一般需控制在35℃以下，其目的是 。
（5）实验探究：产品a的主要成分是K2SO4，试设计实验探究产品a中是否含有氯化物（Cl-）杂质。
实验过程：
| 操作 | 现象 | 结论 |
| ①取产品a的溶液少许，加入 | | 目的是除尽产品中的K2SO4，避免干扰 Cl-的检验 |
| ②过滤，向滤液中加 AgNO3溶液 | | 原样品中含有氯化物（Cl-）杂质 |
6.实验题- (共2题)
(1) 写出图中有标号仪器的名称：a___________，b____________。
(2) 实验室用B、D装置制取氢气的化学方程式为____________________________。
(3)如选用装置A作为制取氧气的发生装置，其化学方程式为__________
(4) 实验室用Ｃ装置收集二氧化碳时，验满的方法是_______________________。
（查阅资料）①珍珠的化学成分主要是：碳酸钙及少量碳酸镁和壳角蛋白(蛋白质的一种)；
②壳角蛋白不溶于水，加入浓硝酸加热后会变黄色；
③假珍珠粉其实就是“贝壳粉”，主要成分就是碳酸钙。
（分析讨论）①真珍珠中所含壳角蛋白在物质类别上属于 （填 “有机”或“无机”）化合物。
②假珍珠粉中的碳酸钙含量要比真珍珠粉大。
（实验探究）研究性学习小组设计了如下两个方案：
方案一检验珍珠粉的真假
取少量珍珠粉样品于试管中， ，若观察到 ，则该珍珠粉是真珍珠粉。
方案二检验该珍珠粉中的碳酸钙含量
步骤Ⅰ：连接仪器组成如图所示实验装置。某学生夹住C左侧的橡胶管，在A中装入少量水并取下上部塞子，打开玻璃活塞，A中水不能全部滴下，你认为该装置是否漏气？ 。
步骤Ⅱ：准确称取6.000 g珍珠粉样品装入仪器B中，在A中装入稀盐酸。
步骤Ⅲ：向B中珍珠粉样品中滴加足量的稀盐酸。在仪器B、C中可观察到的现象为 、 。
步骤Ⅳ：完全反应后C中的浊液经 、 、干燥，称得白色固体的质量为11.820g，则珍珠粉样品中碳酸钙的质量分数为100%。
（实验反思）获得此测定结果，可能的原因有 。（填数字序号）
①样品中含有碳酸镁
②盐酸未滴加足量
③CO2气流速度太快导致未被Ba(OH)2完全吸收
④装置B中水蒸气、HCl等进入装置C中
（拓展延伸）有同学提出在方案二中不需要装置C，只要用电子天平准确称量装置A、B反应前后的质量，就可以得到珍珠粉样品中碳酸钙的含量。你认为是否可行 ，请说明理由 。
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【1】题量占比
计算题:(1道)
单选题:(12道)
选择题:(15道)
多选题:(1道)
填空题:(4道)
实验题:(2道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：7
5星难题：0
6星难题：7
7星难题：0
8星难题：3
9星难题：2