问题 选择题

用NaOH滴定pH相同、体积相同的H2SO4、HCl、CH3COOH三种溶液,恰好中和时,所用相同浓度NaOH溶液的体积依次为V1V2V3,则这三者的关系是(  )

A.V1>V2>V3

B.V1<V2<V3

C.V1=V2>V3

D.V1=V2<V3

答案

答案:D

pH相同、体积相同的H2SO4、HCl溶液中所含有氢离子的物质的量相等,恰好中和时,所用相同浓度NaOH溶液的体积相等。而相同pH的CH3COOH溶液的浓度远大于H2SO4和HCl溶液,与NaOH溶液完全反应时,消耗的NaOH溶液的体积大。

阅读理解

Amanda Clement grew up in Hudson,South Dakota.Baseball was always her favorite sport.Once in a while her brother Hank and his friends would let her play first base in their games.More often,however,they asked her to umpire(裁判)for them, because they knew her calls would be fair and there would be no arguing.

One day in 1904,Amanda and her mother traveled to Hawarden,Iowa,to watch Hank play for the home team against Hawarden.When they arrived at the ball field,two local teams were waiting to play a preliminary(预备)game.The umpire hadn’t arrived,so Hank argued that the teams should let his sister serve as umpire.The players finally agreed.

Amanda,then sixteen and standing five feet,ten inches tall,made perfect calls.

She was so good that players for the main game asked her 10 umpire for them and even

offered to pay her.Thus,at sixteen,Amanda Clement became the first paid female

baseball umpire on record.She is honored in the Baseball Hall of Fame in Cooperstown,

New York.

小题1:Hank and his friends often asked Amanda to umpire for them because      

A.they wanted to make her happy

B.she called them brothers

C.no one else wanted to do it for them

D.she knew the rules well and was fair小题2:Amanda went to Hawarden in order to      

A.serve as umpire

B.make money

C.watch her brother play

D.help the local teams小题3:Amanda most probably learned how to umpire a baseball game       .

A.in her P.E.classes at school

B.in an umpire training school

C.by watching and playing the games

D.from her mother,a baseball umpire小题4:Which of the following can be the best title of the passage?

A.Amanda Clement.First Female Umpire

B.A Family of Baseball Fans

C.Baseball Games in Hawarden,Iowa

D.The Baseball Hall of Fame in Cooperstown

多项选择题