问题 问答题

除去一氧化碳中少量二氧化碳的方法是:使气体通过饱和的氢氧化钙或饱和的氢氧化钡溶液,二氧化碳即转化为碳酸盐沉淀.已知20℃时氢氧化钙和氢氧化钡的溶解度分别为0.165g和3.89g.取两份各100g的水,分别配成氢氧化钙和氢氧化钡的饱和溶液,并用来除去一氧化碳中的二氧化碳.以上两种饱和溶液中何者能除去更多的二氧化碳?通过计算回答.

答案

根据溶解度定义可知溶液中分别含氢氧化钙为0.165g,含氢氧化钡3.89g,设与3.89g氢氧化钡反应消耗二氧化碳的质量为X.

CO2+Ba(OH)2═BaCO3↓+H2O

44    171

X    3.89g

44
171
X
3.89g

解得X=1g;

设与0.165g氢氧化钙反应消耗二氧化碳的质量为Y.

CO2+Ca(OH)2═CaCO3↓+H2O

44    74

Y     0.165g

44
74
=
Y
0.165g

解得Y=0.098g,

因为1g>0.098g,所以氢氧化钡溶液能除去更多的二氧化碳.

答:通过计算知氢氧化钡溶液能除去更多的二氧化碳.

故答案为:氢氧化钡溶液能除去更多的二氧化碳

阅读理解
Summer holidays are just coming.Have you got any plans? Here are 4 five—star films for you to kill your time.

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Type:Adventure;Action
Film Studio:Walt Disney Pictures
Date:May 20th,2011
Captain(船长)Jack Sparrow of the Caribbean has come back.This has made fans of Pirates of the Caribbean very excited.Johnny Depp ,a famous actor,works together with a new director,Rob Marshall to bring a new wave of pirate craze.Johnny Depp is also known for Walt Disney’s film Charlie and the Chocolate Factory.

Sherlock Holmes
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Film Studio:Warner Bros.Pictures
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Do you like detective stories and want to
solve mysteries like well—known Detective
Sherlock Holmes? This one you certainly
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Toy Story 3
Type:Cartoon
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Date:June l8th 2010
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Ice Age 3
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Ice Age 3 is a whole new adventure that
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dinosaur babies and adopts(收养)them as his
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A.Ice Age 3B.Pirates of the Caribbean 4
C.Sherlock Holmes D.Toy Story 3
小题2:Which of the following is RIGHT according to the article?
A.Johny Depp is the director of Pirates of the Caribbean 4.
B.Film fans don’t think Sherlock Holmes is a good film.
C.The two cartoons are produced by the same film studio.
D.Ice Age 3 is a cartoon suitable for different age groups.
小题3:From the article,we know _____is a cruel character.
A.SidB.Sherlock HolmesC.Lotso D.Jack Sparrow
小题4:If you want to watch Ice Age 3, you can watch it on______ .
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C.June 18th,2012D.Dec. 25th, 2008
小题5:What kind of film is Sherlock Holmes ?
A.CartoonB.Detective
C.SitcomD.Documentary
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