问题 填空题

(10分)实验室可用KMnO4和浓盐酸反应制取氯气。其变化可表述为:

2KMnO4+16HCl(浓) ===2KCl+2MnCl2+5Cl2↑+8H2O

(1)请将上述化学方程式改写为离子方程式________________。

(2)浓盐酸在反应中显示出来的性质是________________(填写编号,多选倒扣)。

①只有还原性        ②还原性和酸性

③只有氧化性        ④氧化性和酸性

(3)此反应中氧化产物是        (填化学式),产生0.5molCl2,则转移的电子的物质的量为______mol。

(4).用双线桥法表示该反应的电子转移的方向和数目

答案

(1)2MnO4+16H+10Cl===2Mn2++5Cl2↑+8H2O(2分)

(2)②(2分)

(3) Cl2(2分)   1 (2分)(4)略(2分)

(1)离子方程式为:2MnO4+16H+10Cl===2Mn2++5Cl2↑+8H2O;

(2)HCL在反应中CL元素的化合价部分升高即总分被氧化,部分不变作用酸性;

(3)在氧化还原反应中还原剂生成氧化产物,即为Cl2,产生0.5molCl2,则转移的电子的物质的量为1mol。

(4)

问答题
阅读理解

阅读理解。

     In today's throw-away society, dealing with the city's growing mountain of waste is an increasing

challenge for the city council (市议会).

     Recently, Edinburgh is faced with the problem of disposing of (处理) about 250,000 million tons of

waste a year. Despite different ways to dispose of much of it in a green manner - largely through

encouraging recycling-its aging facilities such as the Powderhall landfill do not have the ability to deal

with it.

     The European Union (EU) has issued a new policy, regulating how such mountains of waste are to be

disposed of. The five councils ( Edinburgh, East Lothian, West Lothian, Midlothian and Borders ) face

fines around £18 million a year from 2013 if they don't increase recycling levels and rely less on landfill. With this in mind, the councils got together with the idea of building a large incinerator plant (垃圾焚烧

厂) to burn half of the waste produced in their districts. But this plan fell apart after the change of target

levels by a new UK government waste policy which required that no more than 25% of the city's waste

should be disposed of in this way by 2025.

     After the plan was abandoned, a private company which already transported millions of tons of the

city's waste by train to a landfill site near Dunbar, offered an alternative solution when it suggested

opening a huge waste site near Portobello.

Since Powderhall is supposed to close in 2015, it seemed necessary for the members of the Edinburgh

Council to accept the suggestion. But soon they turned it down - after 700 local objections reached

them - because it would have meant hundreds of lorries a day making loud noise through heavily

populated areas.

     That still leaves the council with a problem. By 2013, only 50% of 1995 levels of waste will be

allowed to be sent to landfill. Even if recycling targets are met, there will still be a large amount of

rubbish to be burnt up. Due to this, Edinburgh and Midlothian councils have now decided to work

together to build an incinerator plant as time to find a solution is fast running out.

1. The main way of handling waste in a green manner in Edinburgh is ________.

A. recycling   

B. restoring   

C. burying   

D. burning

2. The five councils worked out a plan to build an incinerator plant to ________.

A. reduce the cost of burying waste                

B. meet the EU requirements

C. speed up waste recycling                      

D. replace landfill sites

3. The city council of Edinburgh rejected the suggestion to open a huge landfill site near

    Portobello because ________.

A. it came from a private company              

B. the council was not interested in it

C. it was not supported by EU                  

D. the local people were against it

4. What is the final decision of Edinburgh and Midlothian Councils?

A. To open a new landfill nearby.          

B. To close the Powderhall landfill in 2015.

C. To set up a plan for burning waste.      

D. To persuade people to deduce their waste.