上海新版九年级(下)《第6章 溶解现象》单元测试卷(4)
上海新版九年级下册《第6章溶解现象》单元测试卷（4）一、选择题（每小题2分，共40分．每小题只有一个选项符合题意）
1．（2分）现有a、b两种物质在室温下的饱和溶液，升高温度后，a溶液有晶体析出，而b 溶液还可以再溶解b晶体。则能正确表示a、b两种物质溶解度曲线的是（）
A．B．
C．D．
2．（2分）在t℃时，浓度相同的两份KNO3溶液A和B，A为100g，B为80g，将其各自恒温蒸发掉20g水后，A刚好饱和，对所得的B溶液正确的说法是（）
A．也刚好饱和
B．仍为不饱和溶液
C．是饱和溶液并有晶体析出
D．有晶体析出但溶液仍为不饱和溶液
3．（2分）室温下，饱和食盐水露置在空气中一段时间后，有少量固体析出，这是因为（）A．氯化钠溶解度变小
B．溶液中溶质质量分数变小
C．溶剂质量减少
D．溶液变为不饱和溶液
4．（2分）在一定质量的溶质质量分数为24%的氯化钾溶液中，加入120g水后，溶液中溶质质量分数降低一半，则原溶液中溶质的质量是（）
A．14.4g B．28.8g C．120g D．240g
5．（2分）下列关于溶液的说法正确的是（）
A．从l0%的食盐溶液中倒出一半，余下的溶液质量分数为5%
B．某饱和溶液降温后析出晶体，此时它就变成不饱和溶液
C．向某物质的饱和溶液巾加入少量该物质，溶质的质量分数变大
D．稀溶液可能是饱和溶液，浓溶液可能是不饱和溶液
6．（2分）配制溶质质量分数一定的氯化钠溶液，不必用的仪器是（）A．铁架台B．药匙C．玻璃棒D．烧杯
7．（2分）某温度下的Ca（OH）2饱和溶液的质量分数经下列变化后，溶液中溶质质量分数不变的是（）
A．温度不变，添加水分B．温度不变，蒸发水分
C．水量不变，升高温度D．水量变小，降低温度
8．（2分）用质量分数为60%的酒精溶液A和质量分数为25%的酒精溶液B配成质量分数为45%的酒精溶液．所用A、B溶液的质量比为（）
A．1：2B．4：3C．2：3D．3：1
9．（2分）75g水溶解25g绿矾（FeSO4?7H2O），所得溶液中溶质的质量分数是（）A．等于25%B．大于25%C．小于25%D．无法判断10．（2分）在一定温度下，将少量生石灰放入一定的饱和石灰水中，搅拌并冷却、到原来的温度，下列说法中正确的是（）
A．溶剂质量不变B．溶质质量增加
C．溶液浓度不变D．溶解度增加
11．（2分）能证明某KCl溶液在20℃时已达到饱和状态的方法是（）A．温度不变时，向该溶液中加入少量水，结果溶液变稀
B．取少量该溶液，降温到10℃时，有KCl晶体析出
C．取少量该溶液升温，无KCl晶体析出
D．温度不变，向该溶液中加入少量KCl晶体，晶体不溶解
12．（2分）20℃时，物质的溶解度在0.1克～1克范围内为微溶。已知CaSO4的溶解度如下表所示
若要用硫酸溶液和石灰石反应，来持续较快产生CO2气体，你认为下列措施可行的是（）
A．将石灰石研成粉末状慢慢加入足量硫酸溶液中
B．将块状石灰石加到热的硫酸溶液中
C．将少量的块状石灰石加到过量的硫酸溶液中
D．将块状石灰石加到冷的硫酸溶液中
13．（2分）下列条件下的Ca（OH）2溶液中溶质质量分数最大的是（）A．0℃时的饱和石灰水B．0℃时的不饱和石灰水
C．20℃时的饱和石灰水D．20℃时的不饱和石灰水
14．（2分）将t℃时某KNO3的溶液蒸发10g水后，恢复到t℃，析出晶体ag，再蒸发掉10g 水后又恢复到t℃，析出晶体bg，则a与b的关系是（）
A．a＞b B．a≤b C．a＜b D．无法确定15．（2分）20℃时，将10g下列物质投入到90g水中，充分溶解后所得溶液中溶质的质量分数最小的是（）
A．熟石灰B．食盐C．硝酸钾D．氯化钾
16．（2分）有关溶液（溶质为固体）的说法正确的是（）
A．对于同一溶质的溶液而言，饱和溶液一定要比不饱和溶液浓
B．只要温度不变，某物质饱和溶液中溶质质量分数也不变
C．饱和溶液析出晶体后溶质的质量分数一定减小
D．不饱和溶液变为饱和溶液其溶质的质量分数一定增大
17．（2分）已知x、y、z三种物质的溶解度曲线如图，下列叙述正确的是（）
2．
A．t1℃时，x、y两种物质饱和溶液中溶质的质量分数相同
B．当z中混有少量的x时，可以用结晶的方法进行分离
C．从图中可知y物质一定是气体
D．在t2℃时，x、y、z三种物质的溶解度的大小顺序是x＞z＞y
18．（2分）在温度不变的情况下，将t℃的硝酸铵溶液蒸发掉2.5g水，析出2g晶体，再蒸发5g水，又析出10g晶体（保持温度不变的情况下）则在t℃时硝酸铵饱和溶液的溶质
质量分数为（）
A．8%B．44.4%C．66.7%D．45%
19．（2分）某温度下，100g饱和硝酸钾溶液中含硝酸钾31.6g，现向其中加入4.4g硝酸钾晶体和5.6g水，并且保持溶液温度不变。此时溶液中溶质的质量分数为（）
A．×100%
B．31.6%
C．×100%
D．×100%
20．（2分）将14.3g洗涤碱（Na2CO3?10H2O）溶于多少克水可制得5%的碳酸钠溶液（）A．19g B．91.7g C．38g D．165.7g
二、填空题（本题共38分）
21．（4分）在日常生活中沾有油污的碗筷等物品很难洗净是因为，而用洗洁精很容易洗净这说明了．
22．（6分）在许多情况下，人们希望能够较快地溶解某些同体物质，某课题小组需一定浓度的硝酸钾溶液做实验．怎样使硝酸钾固体较快地溶于水中？
请提出你的操作建议，并说明理由．
建议①：
建议②：
建议③．
23．（10分）实验室配制50g质量分数为5%的食盐溶液和量取一定体积的盐酸．回答下列问题．
（1）实验所需的实验用品是．
（2）在托盘天平上称取g食盐，用规格为（填序号）的量筒量取mL 的水．
A．10mL B．100Ml C．200mL D．500mL
（3）如图为某学生在另一组实验中量取一定体积的盐酸的示意图．
①量筒中有盐酸mL．
②若实验者的眼睛在B处观察，所得读数与实际体积相比（填“偏大”、“偏小”
或“相同”）．
24．（5分）如图是A、B、C三种固体物质的溶解度曲线．看图回答以下问题．（1）在t1℃时，三种物质的溶解度由小到大的顺序是．（用“＜”、“＞”或“＝”
表示）
（2）在时，B和C的溶解度相同．
（3）在t3℃时，A、B、C的饱和溶液各Wg冷却到t1℃时，有晶体析出的是，没有晶体析出的是．
25．（4分）全国开展抗击“非典”以来大部分地区使用过氧乙酸消毒（过氧乙酸的化学式是CH3COOOH），过氧乙酸消毒是由CH3COOOH与水配制而成的：
（1）过氧乙酸消毒液中的溶质是；溶剂是．
（2）过氧乙酸分解产生氧，能有效地氧化病毒，有较强的腐蚀性，配制过氧乙酸应用下列哪种容器．
A．铁制容器B．铝制容器C．塑料容器
（3）配制100kg 0.5% 喷洒液最多需要5% 过氧乙酸溶液kg．
26．（4分）李小明做了一个梦，他能像孙悟空一样缩身甚至能缩小到分子那么大．假设李小明的梦是一个科学事实，把他放入稀的硫酸铜溶液中，他会见的“朋友”是（用分子离子观点回答，下同）；他看到的现象是．
27．（5分）如表是硫酸钠在相应温度时的溶解度数据，以及在对应条件下溶液中析出固体的化学式．
曲线M N
温度t/℃010203040506080溶解度
5.09.019.440.848.84
6.745.343.7
S/g
溶液中析
Na2SO4?10H2O Na2SO4出固体的
化学式
（1）请你利用上表中相关数据，在坐标格内绘制M和N两条溶解度曲线，并根据曲线M、N的趋势，将M向右、N向左自然延伸直至两曲线相交为止，得以交点P．
（2）在交点P处所代表的溶液中，溶质质量分数为（填“最大”或“最小”）．（3）请在箭号的上、下处填写合理的温度数据，以表示下列关系式的成立：Na2SO4?10H2O
（s）Na2SO4（s）+10H2O（1）
其中化学式后括号内的小写字母含义：“s”表示固体，“1”表示液
体．
三、计算题（本题共22分）
28．（10分）日常生活中我们要科学地节约用水．现有一件刚用洗涤剂洗过的衣服，“拧干”
后湿衣服上残的溶液为100g，其中含洗涤剂的质量分数为1%，则湿衣服上残留的洗涤剂质量为g．现用5700g 清水对这件衣服进行漂洗，有以下两种方法（假设每次“拧干”后湿衣服仍残留100g 溶液）．
方法一：用5700g 清水一次漂洗，“拧干”后残留在衣服上的洗涤剂的质量为（用分数表示）g；
方法二：将5700g 清水均分成质量相等的三份（每份1900g ），分三次漂洗．
第1次，用1900g 清水漂洗，“拧干”后残留在衣服上的洗涤剂的质量为（用分数表示）
g；
第2次，再用1900g 清水漂洗，“拧干”后残留在衣服上的洗涤剂的质量为（用分数表示）g；
第3次，再用1900g 清水漂洗，“拧干”后残留在衣服上的洗涤剂的质量为（用分数表示）g；
由以上计算分析，用相同的质量的水漂洗衣服，是一次漂洗效果好，还是将水等分三份，分三次漂洗效果好？
．
上海新版九年级下册《第6章溶解现象》单元测试卷（4）
参考答案
一、选择题（每小题2分，共40分．每小题只有一个选项符合题意）
1．B；2．C；3．C；4．B；5．D；6．A；7．B；8．B；9．C；10．C；11．D；12．A；13．A；14．B；15．A；16．B；17．A；18．C；19．B；20．B；
二、填空题（本题共38分）
21．植物油难溶于水；洗沽精具有乳化作用，能使油分散到水中；22．将硝酸钾研碎；搅拌；加热；23．托盘天平、烧杯、量筒、玻璃棒、药匙；2.5；B；47.5；14；偏大；24．S A ＝S C＜S B；t2℃；C；AB；25．CH3COOOH；水；C；10；26．水分子、铜离子、硫酸根离子；水分子、铜离子、硫酸根离子不断地自由运动，铜离子和水分子结合在一起显蓝色；27．最大；
三、计算题（本题共22分）
28．1；；；；；分三次漂洗效果好；
人教版九年级上册英语单元测试题全套
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初三英语单元测试题及答案
新目标英语第8单元测试题 ? 一、根据句意和首字母，填写所缺单词。 1. I am very a_____. Give me some food, please. 2. It’s Friday today. Don’t p____ off it any more. 3. He is a v_______, and he often treats some animals. 4. My computer is broken. He is r_____ it for me. 5. His father is able. He can s_____ this problem by himself. 6. There is a s_____. It says“No Smoking!”. 7. His grandfather can’t walk and has to sit in a w______. 8. I love dogs because they never c______ and they’re grateful. 9. Lucy and Lily are twins, so they are s_____ in many ways. 10. He is my best friend. We all t_____ in him. 二、试试你的判断力，选择正确答案。 1. It’s your turn to _____ the room, Wang Fang. A. clean up B. clean to C. clean-up D. clean off 2. I’m thirsty. I’d like _____ a glass of water. A. drink B. to drink C. drinking D. drank 3. A: Must I go out for a walk now B: No, you _____. A. mustn’t B. can’t C. needn’t D. may not 4. Ask him _____ come to our party tomorrow. A. not B. not to C. doesn’t D. isn’t 5. It’s twelve now. Let’s have _____ lunch together. A. a B. an C. the D. x 6. I am a League Member. I volunteer my time _____ others. A. help B. to help C. helping D. helped 7. I don’t know _____ kind of work I can do. A. how B. what C. who D. why
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九年级英语上学期单元测试题 听力部分15％ Ⅰ。选择与所听句子意思相符的图片，按顺序将相应序号填在横线上：5% A B C D E 1._________ 2.___________ 3.__________ 4._________ 5.__________ Ⅱ.根据对话选择正确答案, 每段对话读两遍。5% 听第一段对话，回答第1、2小题： ( )1.Ann wants to get some medicine for her ___________ . A. father B. mother C. brother ( )2.The drugstore is on the ________ floor, next to the __________. A. third / restroom B. second / bookstore C. second / restroom 听第二段对话，回答第3、4、5小题： ( )3. Lucy is a little nervous because she doesn’t know the in Japan. A. people B. customs C. cities ( ) 4. Mary has been to Japan . A. twice B. once C. several times ( ) 5.Lucy should wear if she is invited to a party. A. jeans B. a sweater C. a dress Ⅲ.听短文，根据你听到的内容，选择最佳答案。短文读三遍。5％ ( )1. Peter lived with his __________. A. grandparents B. brothers C. parents ( ) 2. One night he found that _________ beside the fireplace was burning . A. the table B. the wood C. the door ( ) 3.________ , so he could not put out the fire . A.Everybody was asleep B.He couldn’t shout loudly C.There was no water in the house ( ) 4.Peter knocked on the doors of many houses _________. A.to wake the people up B.to get some water C.to find his classmates ( ) 5.__________ hurt in the fire . A.People in other houses were B.Peter’s parents were C.Nobody was
九年级英语单元测试题含答案
九年级英语单元测试题 含答案 Standardization of sany group #QS8QHH-HHGX8Q8-GNHHJ8-HHMHGN#
Unit 1 How can we become good learners 单元基础水平测试题 （试题总分100分测试时间45分钟） 一. 单项选择（每小题1分，共15分） 从A、B、C、D四个选项中选择可以填入空白处的最佳答案。 ( ) 1. My cousin Mary was born ______ a singing voice. A. from B. in C. with D. at ( ) 2. —Lily, ______ do you practice your English —By memorizing sentence patterns. A. why B. how C. when D. where ( ) 3. Alan, you can’t go out to play ______ you clean your room. A. if B. because C. since D. unless ( ) 4. —Cindy, you learn physics so well. What’s your ______—Doing a lot of exercises. A. secret B. knowledge C. expression D. ability ( ) 5. If we don’t use money ______, we’ll have a difficult time. A. happily B. easily C. loudly D. wisely ( ) 6. It will take a lot of time, so you must be ______, young man. A. quiet B. patient C. creative D. active ( ) 7. Sorry, what did you say I didn’t hear. Would you mind ______ it A. connecting B. reviewing C. copying D. repeating ( ) 8. There is much snow in the yard. ______ going out to make a snowman A. What about B. Why not C. Would you like D. Could you please ( ) 9. David finds ______ difficult to communicate with his parents. A. one B. it C. this D. that ( ) 10. Peter is afraid ______ English in class because his pronunciation isn’t good. A. speaking B. speak C. to speak D. to speaking