问题 实验题

为探索工业废料的再利用,某化学兴趣小组设计了如图实验方案,用含有铝、铁和铜的合金制取氯化铝、绿矾晶体(FeSO4·7H2O)和胆矾晶体。

请回答:

(1)步骤I、Ⅱ、Ⅲ中均需进行的实验操作是________________。

(2)溶液A中的离子主要有____________;试剂X是_______。

(3)进行步骤Ⅱ时,该小组用如图所示装置及试剂将制得的CO2气体通入溶液A中。一段时间后,观察到烧杯中产生的白色沉淀逐渐减少,其原因是____________________ (用离子方程式表示);为了避免固体C减少,根据下图所示,改进的措施是___________________。

(4)从环境保护角度考虑,用固体F制备CuSO4溶液的化学方程式是____________________。

答案

(1)过滤

(2)Na+、AlO2-、OH-;稀硫酸

(3)Al(OH)3 +3H+ = Al3+ +3H2O;在装置I、Ⅱ之间增加一个盛有饱和NaHCO3溶液的洗气瓶(合理答案即给分)

(4) 2Cu+ O2+ 2H2SO4 = 2CuSO4+2H2O

阅读理解

Mr. Reese was born in a big city. His father had several companies and got a lot of money. He could give his son all the young man wanted. He was busy with his business and never asked him how he got along with his studies. So the boy spent most time in the restaurants or cinemas. Of course he was weak at his lessons and learned nothing at school. He made many friends but none of them was good and when they knew he came from a rich family, they began to teach him to gamble(赌博). Of course he lost much money.

  Now Mr. Reese was twenty and finished middle school. He could not do anything. But his father didn't mind it until one day he found the young man had sold one of his companies. He became so angry that he made him leave his house. The young man couldn't gamble any longer. His friends made him pay his debt. He had to ask his mother to help him and the woman often gave him some money. But one evening his father happened to find it. The old man stopped his wife from doing so. They began to fight in the room. The young man brought out a knife and killed his father. His mother helped him to run away, but soon after that he was caught and sentenced(判刑)to death.

  It was a cold and wet day. Suddenly it began to rain hard when Mr. Reese was being sent to the execution ground(刑场). Soon both he and the soldiers were wet through. He said angrily,“Bad luck! I shall be shot in such bad weather!”

  “Don't complain(抱怨), brothers” said one of the soldiers. “You're luckier than us all. We'll have to go back to the city after that!”

小题1:Old Reese never wanted to know about his son's studies because _________.

A.he was sure his son was good at his lessons

B.he spent all his energies on his business

C.he knew nothing about the education

D.his wife looked after their children小题2:The bad young men taught Young Reese to gamble in order _________.

A.to play with him

B.to spend spare time

C.that the could get much money from him

D.that they could find jobs in his father's companies小题3:Old Reese became angry because _________.

A.him son had learned nothing at school

B.his son was weak at all his lessons

C.his son couldn't do anything in the companies

D.his son had lost one of his companies小题4:Mr. Reese complained _________.

A.he was sentenced to death

B.he would be shot

C.he went to the execution ground on foot

D.he would be shot in bad weather

单项选择题