试题与答案

铁元素及其化合物与人类的生产生活息息相关, 试回答下列问题: (1)电子工业常用

题型:问答题

题目:

铁元素及其化合物与人类的生产生活息息相关,

试回答下列问题:

(1)电子工业常用30%,的FeCl3溶液腐蚀敷在绝缘板上的铜箔,制造印刷电路板,写出该反应的离子方程式______.

(2)高炉炼铁过程中会发生反应:FeO(s)+CO(g)⇌Fe(s)+CO2(g).

已知:Fe(s)+

1
2
O2(g)═FeO(s)△H=-272kJ•mol-1

C(s)+O2(g)═CO2(g)△H=-393.5kJ•mol-1

2C(s)+O2(g)═2CO(g)△H=-22lkJ•mol-1

则:①FeO(s)+CO(g)⇌Fe(s)+CO2(g)△H=______.

②一定温度下,向某密闭容器中加人足量FeO,并充人一定量的CO气体,反应过程中CO和CO2的浓度与时间的关系如图所示

则从开始至达到平衡过程中,v(CO)=______;该温 度下,FeO(s)+CO(g)⇌Fe(s)+CO2(g)的化学平衡常数K=______.

(3)铁红是一种红色颜料,其成份是Fe2O3.将一定量的铁红溶于160mL 5mol•L-1盐酸中,再加人一定量铁粉恰好完全溶解,收集到气体2.24L(标准状况),经检测,溶液中无Fe3+,则参加反应的铁粉的质量为______.

答案:

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题型:阅读理解

阅读理解。

     Do you now that animals have love for each other and their children just like us humans? Let me tell you

some moving stories of great animal parents.

     Several years ago a heavy rain hit a town and made the river go up. When the rain stopped, people found

that a dog swam to an island in the river twice a day for two weeks. Why did she do so? Her four children

were there. The mother swam there every day to feed her babies. This true story moved many people.

     Another story is about chimpanzees (猩猩). A scientist named Jane Goodall spent 4 years living with

chimpanzees in Africa. She found that chimpanzees also cared for those that were hurt or got lost. "It is not

only humans who have duties, animals also do," she said.

    Two birds in Chengdu also showed their parental (父母的) love. Their baby was hurt and fell on the street

in the center of the city. Cars were driving past but the brave parents rushed down to the road and took the

little bird away with their claws (爪子).

1. After the heavy rain, the mother dog swam to the island ________.

A. to look for food

B. to feed her babies

C. to move some people

D. to carry things to her owner

2. The scientist found chimpanzees ________.

A. cared for the hurt or lost ones

B. often left for a far place

C. always stayed in the same place

D. didn't care about each other

3. The two birds rushed down and took the little one away because ________.

A. they didn't like their baby

B. they were not kind enough

C. they wanted to teach their baby

D. they wanted to save their baby

4. From the passage we know ________.

A. dogs like to swim across the river in a heavy rain

B. mother birds don't want to save their children

C. animal parents love their children a lot

D. all animals want to move people very much

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