问题 填空题

(10分)氯气是氯碱工业的主要产品之一,它是一种常用的消毒剂,其消毒原理是与水反应生成了次氯酸:

Cl2 + H2O  HCl + HClO K=4.5×10-4

次氯酸的强氧化性能杀死水中的病菌(不直接用次氯酸为自来水消毒是因为次氯酸易分解,且毒性较大)。但是,由于氯气贮运不方便,且具有一定的危险性,目前正逐渐被其它性能优越的消毒产品所替代。请回答:

(1)氯碱工业生产氯气的化学方程式为                                       

(2)84消毒液(主要成分为NaClO)与氯气相比具有贮运方便等优点,用氯气与烧碱溶液反应制备84消毒液的离子方程式为                                          

(3)二氧化氯是一种高效、广谱、安全的杀菌、保鲜剂。我国科学家研发了用氯气氧化亚氯酸钠(NaClO2)固体制备二氧化氯的方法,其化学方程式为                        

(4)一位同学设计了一套用浓盐酸和KMnO4固体制取少量氯气并比较氯气与碘单质的氧

化性强弱的微型装置(如图)。

①下列溶液能吸收Cl2的是       (填字母序号)。

A.饱和食盐水

B.饱和Na2SO3溶液

C.饱和NaOH溶液

D.浓硫酸②能说明Cl2的氧化性强于I2的实验现象是                              

答案

(10分)

(1)2NaCl + 2H2O ="==" 2NaOH + Cl2↑+ H2↑(2分,条件写“通电”或“电解”均可)

(1)氯碱工业生产氯气的化学方程式为:2NaCl+H2OCl2↑+2NaOH+H2

(2)用氯气与烧碱溶液反应制备84消毒液的离子方程式为:Cl2+2OH=Cl+ClO+H2O

(3)用氯气氧化亚氯酸钠(NaClO2)固体制备二氧化氯的化学方程式为:Cl2+2NaClO2=2ClO2+2NaCl

(4)①能吸收Cl2的溶液是B C

②能说明Cl2的氧化性强于I2的实验现象是:湿润的淀粉碘化钾变蓝。

阅读理解

Making Peace with Your Parents

As a teen, you’re going through big changes physically and mentally. Your interests are expanding.  小题1: 

Here is the challenge: Kids need to explore the world in new ways, and parents need to protect them from the dangers that are out in that world. These conflicts (矛盾) can easily set off fireworks in otherwise calm houses. Sometimes conflicts can’t be avoided. But by paying attention to the building blocks of successful relationships, you can work towards making home a happy and healthy place for you and your parents.

For instance, try to find a time to talk when your parents are not angry, tired, distracted, or hungry. A good time to talk is when you’re all relaxed. Timing is everything. If the conversation begins to turn into an argument, you’d better calmly and coolly ask to stop the conversation -- for now. 小题2: Listen to what your parents are saying, and repeat it back to them. This shows them that you’re listening.小题3:_ 

Respect is the building block of good communication. People who respect each other and care about each others’ feelings can disagree without things getting ugly. _小题4:__ How do you build trust?  Trust comes by actually doing what you say you’re going to do. Some teens find that doing fun activities with their parents can improve their relationships. Sometimes we forget that parents are more than rule-makers—they’re interesting people who like to watch movies, and go shopping—just like their teenagers!

What do you do if you are trying your best, but your relationship with your parents continues to be rocky? _小题5:__ You can find supportive adults, such as a teacher or a coach, who can lend an ear.

Remember you can only change your own behavior; your parents are the only ones who can change theirs.

A.It also gives them a chance to clear things up if you’re not on the same page.

B.You can pick it up again when everyone’s more relaxed.

C.And then you’ll be able to accept what your parents say.

D.Faced with the challenge, children don’t know what to do.E. You are more likely to get along with your parents and have more independence if your parents believe in you.

F. And your desire to take control of your own life is growing.

G. You may consider seeking outside help.

单项选择题