2015年人教版初中化学九年级下册9.3练习卷(带解析)

适用年级:初三
试卷号:311117

试卷类型:课时练习
试卷考试时间:2017/8/18

1.计算题(共2题)

1.
汽车蓄电池中稀硫酸的溶质质量分数为28%,密度为1.2克/厘米3。若要在实验室用溶质质量分数为98%的浓硫酸配制这种稀硫酸630 克。求:
(1)630 克稀硫酸的体积是多少毫升___________?
(2)需要浓硫酸多少克_______________________?
2.
26g黄铜(Cu-Zn合金)与100g稀硫酸在烧杯中恰好完全反应,反应后测得烧杯中剩余物的总质量为125.8克。求:⑴黄铜中铜的质量分数;⑵反应后所得溶液中溶质质量分数。(计算结果精确到0.1%)

2.简答题(共1题)

3.
现有200g溶质质量分数为10%的硝酸钾溶液,若使溶液的溶质质量分数增加一倍,因向溶液加入硝酸钾    g,或蒸发掉水 g。

3.选择题(共4题)

4.完形填空

    Reading good books is one of the greatest pleasures in life. It 1 our happiness when we are cheerful, and lessens our 2 when we are sad. A good book may absorb our attention so 3 that for the time being we forget our 4.

    Whatever may be our main purpose in reading, good books should never fail to give us 5. With a good book in our hands we will never be 6. Whether the characters in the book are taken from real life or are purely 7, they may become our companions and make us laugh. The people we meet in books may 8 us either because they are similar to our close friends or because they present 9 types whom we are glad to welcome as new acquaintances. Our human friends sometimes 10 us, but the friends we make in books are always respect us. By turning the pages we can 11 them without any fear of hurting their feelings, When our human friends 12 us, good books are always there to give us sympathy and encouragement.

    One of the most valuable gifts from books is 13. Few of us can travel far from home.14 all of us can lead varied lives through the pages of book. When we wish to 15 from the dull realities of everyday life, a book will help us when 16 else can. To travel by book we don't have to 17 and save a lot of money. Through books we may gel the thrill of adventure without 18. We can climb high mountains or cross the hoi sands of the desert,19, through books the whole world is ours for the asking. The 20 of our literary experiences are almost unlimited.

5.完形填空

    Reading good books is one of the greatest pleasures in life. It 1 our happiness when we are cheerful, and lessens our 2 when we are sad. A good book may absorb our attention so 3 that for the time being we forget our 4.

    Whatever may be our main purpose in reading, good books should never fail to give us 5. With a good book in our hands we will never be 6. Whether the characters in the book are taken from real life or are purely 7, they may become our companions and make us laugh. The people we meet in books may 8 us either because they are similar to our close friends or because they present 9 types whom we are glad to welcome as new acquaintances. Our human friends sometimes 10 us, but the friends we make in books are always respect us. By turning the pages we can 11 them without any fear of hurting their feelings, When our human friends 12 us, good books are always there to give us sympathy and encouragement.

    One of the most valuable gifts from books is 13. Few of us can travel far from home.14 all of us can lead varied lives through the pages of book. When we wish to 15 from the dull realities of everyday life, a book will help us when 16 else can. To travel by book we don't have to 17 and save a lot of money. Through books we may gel the thrill of adventure without 18. We can climb high mountains or cross the hoi sands of the desert,19, through books the whole world is ours for the asking. The 20 of our literary experiences are almost unlimited.

6.Who does this T-shirt belong ______?
7.

下列不属于亲社会行为的是 ()

4.单选题(共2题)

8.
每天补充适量的维生素C,有利于提高人体免疫力.某维生素C泡腾片,每片含1g维生素C.将1片该泡腾片投入适量水中,最终得到250g溶液.此溶液中维生素C的质量分数为( )
A. 0.4%
B. 1%
C. 2.5%
D. 4%
9.
下图是用NaCl固体配制生理盐水的主要操作,其中错误的是( )
A.取用NaCl
B.称量NaCl
C.量取H2O
D.溶解NaCl

5.填空题(共3题)

10.
如图是某输液瓶标签上的部分内容.葡萄糖由  种元素组成,其中碳元素的质量分数为  ,要把10g这种葡萄糖溶液稀释为2%的溶液,需要水的质量为  
11.
(2011年广东揭阳,22题)在某温度下,NaCl 的溶解度为36g,求:
(1)在此温度下200g水最多可溶解 克NaCl
(2)2010g此温度下的饱和溶液里溶质的质量分数为    %(精确到0.1%)
12.
(4分)甲、乙两物质的溶解度曲线如图所示,请据图回答下列问题。

⑴20℃时,甲物质的溶解度是 g;
⑵20℃时,甲物质的饱和溶液中溶质和溶剂的质量比为
⑶欲将40℃时乙物质的饱和溶液变为不饱和溶液,可采用的方法是  ;(写一种即可)
⑷40℃时,将甲、乙两物质的饱和溶液分别降温到20℃,所得溶液的溶质质量分数的大小关系是
试卷分析
  • 【1】题量占比

    计算题:(2道)

    简答题:(1道)

    选择题:(4道)

    单选题:(2道)

    填空题:(3道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:1

    5星难题:0

    6星难题:3

    7星难题:0

    8星难题:2

    9星难题:1