问题 问答题

据《新安晚报》报道,2007年1月,在安徽六安汉墓考古发掘工作中出土了一批青铜壶、漆器、木器、玉器等精美的文物,青铜壶、漆器、木器、玉器表面的雕刻出神入化,栩栩如生,青铜壶的表面还附有绿色固体物质.六安汉墓是我国近几年重大考古发现之一.

上述报道引发了某校九年级化学兴趣小组同学的关注,他们收集家中铜器表面的绿色固体,进行探究:

提出问题:铜器表面附着的绿包固体物质是由哪些元素组成的?

猜    想:查阅相关资料后,猜想绿色固体物质可能是铜绿

设计与实验:

①对试管内的绿色固体加热,至完全分解,观察到A装置中绿色固体逐渐变成黑色,B装置中无水碳酸铜变成蓝色,C装置中澄清石灰水变浑浊.

②取少量加热后生成的黑色固体于试管中,加入稀硫酸.观察到黑色固体逐渐溶解,溶液变成蓝色.

③取少量上述蓝色溶液于试管中,浸入一根洁净的铁丝.观察到铁丝表面有红色物质析出.

实验结论:绿色固休物质中含有______、______、______、______(提示:装置内的空气因素忽略不计)

表达与交流:(1)上述③中发生反应的化学方程式为______ 

(2)反应完成后,如果先移去酒精灯,可能出现的现象是什么?______.

如果将B,C两装置对调,行吗?为什么?______.

你还有其它问题需要探究吗?请提出你还要探究的问题及其猜想.

提出问题猜想
____________

______

答案

实验结论:绿色固体加热,至完全分解,B装置中无水硫酸铜变成蓝色,说明反应有水生成,从而可确定物质中含有氢、氧元素;C装置中澄清石灰水变浑浊,说明生成了二氧化碳,可确定物质中含有碳、氧元素;铜器上出现的固体,A装置中绿色固体逐渐变成黑色,则黑色固体可能是氧化铜,加入稀硫酸.观察到黑色固体逐渐溶解,溶液变成蓝色,说明黑色固体一定是氧化铜,原固体中含有铜、氧元素,所以绿色固体物质中含有氢、碳、氧、铜.

表达与交流:(1)氧化铜和硫酸反应生成的蓝色溶液为硫酸铜溶液,取少量上述蓝色溶液于试管中,浸入一根洁净的铁丝,观察到铁丝表面有红色物质析出,是铁和硫酸铜反应生成的硫酸亚铁和红色的铜,方程式为:Fe+CuSO4=FeSO4+Cu.

(2)反应完成以后,如果先移去酒精灯,试管中气体温度降低,气压减小,水槽中的水会倒吸入B装置;如果将B、C两装置对调,气体通过C会带出水蒸气,不能确定加热绿色固体是否有水生成.

对绿色固体的形成或性质等提出问题,并根据以上对铜绿的探究,进行猜想;

故答案为:

实验结论:氢、碳、氧、铜;

表达与交流:(1)Fe+CuSO4=FeSO4+Cu;(2)C装置中液体会倒流进入B装置中;不行,若对调则无法证明加热绿色固体是否有水生成.

提出问题猜想
绿色固体是怎么形成的?可能是Cu 与O2等元素.H2O(气)等发生复杂反应后生成的
绿色固体能够与稀HCl反应吗?

阅读理解

C

It was at least tow months before Christmas, when nine-year-old Almie Rose told her father and me that she wanted a new bike. Her Barbi bike was just too old, and it needed repairing as well.

As Christmas came nearer, her dream for a bike seemed to disappear, so we thought, for she didn’t mention it again. We were busy buying some beautiful storybooks, a doll house, a holiday dress and toys. Then much to our surprise, on December 24, she said she really wanted a bike more than anything else.

Now we didn’t know what to do. It was just toot late. We were busy with Christmas dinner and packing children’s presents, parents’ presents, a brother’s present and friends’ presents till midnight.So there was no time to take to buy the “right bike” for our little girl. Thinking that we were parents who would make their children unhappy, we felt guilty and sad.

Suddenly my husband came up with an idea. “What if I make a little bike out of clay(泥土) and write a note(便条) that she could trade in(交换) the model bike for a real one?” So he spent the next five hours carefully working with the clay to make a small bike.

On Christmas morning, we were so excited for Almie Rose to open the little box with the beautiful red and white clay bike and the note. She opened and read the note loudly.

She looked at me and Ron and said, ”So does this mean I can trade in this bike for a real one?” Smiling, I said, “Yes.”

Almie Rose had tears in her eyes when she replied, “I would never trade in this beautiful bike that Daddy made me. I prefer to keep it rather than get a real bike.” At that moment, we would have moved the God to buy her every bike on the Earth.

小题1:Rose’s wish was to____ on Christmas Day.

A.get a new bike

B.make a clay bike

C.receive a doll house

D.repair her old Barbi bike小题2:Rose’s parents didn’t buy her a bike because she____.

A.didn’t want a bike any more

B.changed her idea to some story books

C.didn’t mention it in the last tow months

D.asked for it only on December 24小题3:The word “guilty” in the third paragraph(段落) means____.

A.unhappy

B.worried

C.happy

D.sorry小题4:Rose’s father got a good idea to____.

A.spend five hours finishing making a small bike with clay

B.make a small bike red and white

C.make her old bike red and white

D.put the present in the box小题5:From Rose’s words in the last passage , we know that she____

A.still wanted to get a real bike

B.didn’t know the meaning of the note

C.preferred a real bike to a model bike

D.was greatly moved by what her father had done

单项选择题