问题 问答题

(6分)根据下图回答问题

(1)写出标有序号的仪器名称:①          ;②          。

(2)用高锰酸钾制取氧气时,所选用的发生装置是(填序号,下同)          ,收集装置是C或          ,反应的化学方程式为          。

(3)用大理石和稀盐酸制取二氧化碳时,所选用的发生和收集装置为          。

答案

分析:(1)根据装置图中仪器的示意图,写出指定仪器的名称;

(2)根据加热高锰酸钾制取氧气时的反应特点,确定此时所选用的发生装置;根据氧气的密度与溶解性,确定收集氧气时的收集装置;并默写出该反应的化学方程式;

(3)根据使用大理石与稀盐酸反应制取二氧化碳的药品与反应条件,判断发生装置;根据二氧化碳的密度与溶解性,判断收集二氧化碳的装置.

解答:解:(1)仪器①为发生装置中用于固体加热的反应容器试管,仪器②为收集装置中用于收集气体的集气瓶;

(2)加热固体高锰酸钾制取氧气时,应选取可用于加热的发生装置A;由于氧气密度比空气大且不易溶于水,因此可选用装置C向上排空气或装置E排水法收集氧气;该反应的化学方程式为2KMnO4K2MnO4+MnO2+O2↑;

(3)使用固体大理石与液体稀盐酸反应制取二氧化碳时,应选用装置B作为发生装置;由于二氧化碳密度大于空气且能溶于水,因此收集时只能采取向上排空气法即装置C进行收集二氧化碳;

故答案为:

(1)①试管,②集气瓶;

(2)A,E,2KMnO4═K2MnO4+MnO2+O2↑;

(3)BC.

选择题
阅读理解

It’s summer movie time again. And heroes are ready to try their strength and magic on the silver screen. Check out our list of four films that look most promising to young audience.

Harry potter and the Prisoner of Azkaban

Release Date:  June 4

Story: It’s the summer before Harry Potter’s third year at Hogwarts School of Witchcraft and Wizardry. A shadow is hanging over Hogwarts. A dangerous murderer, Sirius Black, has escaped the Wizards’ Prison. And he broke out to fulfill one task to kill Harry Potter.

Around the World in 80 Days

Release Date:  June 16

Story: This version of the classic novel set in 1872 focuses on Passepartout ( Hong Kong actor Jackie Chan), a Chinese thief who seeks refuge with a strange London adventurer, Phileas Fogg. Passepartout uses his martial arts skills to defend Fogg from danger as he travels around the world in 80 days to win a bet.

Spider- Man 2

Release Date: June 30

Story :Peter Parker is still coming to terms with his dual (双重的) identity as the crime superhero Spider-Man. He wants to reveal his secret identity to Mary Jane: meanwhile, his aunt May has fallen on hard times. A new villain(坏人) , Dr Otto Octavius, has appeared to cause more troubles.

King Arther

Release Date: July 7

Story: King Arthur is presented as a clever ruler who manages to unite all the knights(骑士) in Britain after the fall of the Roman Empire. Under the guidance of Merlin and the beautiful, brave Guinevere, Arthur will struggle to realize his dreams

1. According to the passage, if you want to see a film whose leading actor is Jackie Chan, you will see the film on _____.

A. June 4   B. June 16   C. June 30   D. July 7

2.In Spider Man 2, Aunt May’s trouble is caused by_____.

A. Peter Parker   B. Mary Jane   C. Dr. Otto Octavius  D. Spider-Man

3. Which of the following films is set in ancient Britain?

A. Harry Potter and the Prisoner of Azkaban.

B. Around the world in 80 Days.

C. Spider-Man 2

D.King Arthur