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2026高考化学二轮复习| 可免费下载打印

  • 2026-03-04 09:23:18
2026高考化学二轮复习| 可免费下载打印
2026春新教材已更新!

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限时微模拟(30min)

“32”模拟练()

一、选择题

1. 下列化学用语或图示表达错误的是()

A. CH3CH(CH2CH3)2的名称:3-甲基戊烷

B. SO2VSEPR模型:

C. CH4C原子杂化轨道的电子云轮廓图:

D. CaF2的形成过程:

2. 下列实验目的对应的实验操作正确的是()

选项

实验目的

实验操作

A

检验CH3CH2X中的卤素原子的种类

CH3CH2X(卤代烃)NaOH溶液共热,冷却后取上层水溶液,加入AgNO3溶液,观察沉淀颜色

B

证明金属活动性:KCu

将少量K投入CuSO4溶液中,观察是否产生红色固体

C

检验乙醇中是否含有水

向乙醇中加入一小粒金属钠,观察是否有气体生成

D

验证久置的

Na2SO3是否变质

取少量久置的亚硫酸钠样品溶于除氧蒸馏水中,加入足量的稀盐酸,再滴加氯化钡溶液,观察是否有白色沉淀出现

3. 常温下,用0.100 0mol/L盐酸分别滴定20.00mL浓度均为0.100 0mol/L三种一元弱酸的钠盐(NaXNaYNaZ)溶液,滴定曲线如图所示。下列判断错误的是()

A. NaX溶液中:c(Na)c(X)c(OH)c(H)

B. 三种一元弱酸的电离常数:Ka(HX)Ka(HY)Ka(HZ)

C. pH7时,三种溶液中:c(X)c(Y)c(Z)

D. 分别滴加20.00mL盐酸后,再将三种溶液混合:c(X)c(Y)c(Z)c(H)c(OH)

二、填空题

4. Fe(OH)2具有较强的还原性,新制的白色Fe(OH)2会逐渐转变为灰绿色,使学生误认为氢氧化亚铁的颜色是灰绿色。为能较长时间观察到白色Fe(OH)2,某实验小组做了如下探究实验。

(1)配制实验所需一定物质的量浓度的溶液备用,配制溶液时所用仪器有托盘天平、烧杯、量筒、玻璃棒、______________________

(2)实验时发现即使是用煮沸过的蒸馏水配制实验所用的溶液,新生成的Fe(OH)2也仅能存在几分钟,其原因可能是________________________________________________________

(3)甲同学按如图a所示操作制备Fe(OH)2(溶液均用煮沸过的蒸馏水配制)。挤入少量NaOH溶液后,立即出现白色沉淀,但很快变成浅绿色,一会儿后变为灰绿色,最终变为红褐色。请分析固体变色的原因:____________________________________________________________________

a

b

(4)乙同学经查阅资料后设计了如图b所示的装置(溶液均用煮沸过的蒸馏水配制),能较长时间观察到白色Fe(OH)2

该反应的原理为__________________________________________________________(用离子方程式表示)

结合原理和装置特点分析能较长时间观察到白色Fe(OH)2的原因:______________________________________________________(5)实验试剂最佳浓度探究:

采用不同浓度的试剂进行实验,记录如下。

c(FeSO4)/(mol/L)

c(NaHCO3)/(mol/L)

1.0

1.5

2.0

1.0

现象

产生白色沉淀和气泡,沉淀逐渐变暗,气泡增多

产生白色沉淀和气泡,沉淀逐渐变暗,气泡产生速率较快

产生白色沉淀和气泡,沉淀逐渐变暗,气泡产生速率迅速

稳定时间

3.5 min

9 min

24 min

1.5

现象

产生白色沉淀和气泡,沉淀逐渐变暗,气泡增多

产生白色沉淀和气泡,沉淀逐渐变暗,气泡产生速率较快

产生白色沉淀和气泡,沉淀逐渐变暗,气泡产生速率迅速

稳定时间

13 min

15 min

22 min

2.0

现象

产生白色沉淀和气泡,沉淀逐渐变暗,气泡增多

产生白色沉淀和气泡,沉淀逐渐变暗,气泡产生速率加快

常温下无现象,加热后产生白色沉淀

稳定时间

3 min

8 min

30 min

由以上实验可得到的规律是_____________________________________________

NaHCO3溶液的浓度为1.5 mol/L时,FeSO4溶液的最佳浓度为__________(“1.0”“1.5”“2.0”) mol/L

(6)实验创新:延长Fe(OH)2沉淀的稳定时间还可以采取的措施为__________________________________________________________________(任写一条)

5. 一种合成有机物G的合成路线如图:

(1)AB反应的试剂和条件是________________________

(2)BC反应的反应类型为__________________________C中含氧官能团的名称为________________

(3)M的化学式为C8H8O2S,则M的结构简式为______

(4)写出反应EF的化学方程式:______________________

________________

(5)化合物KA的同系物,相对分子质量比A的多14K的同分异构体中,同时满足下列条件,且核磁共振氢谱有5组峰,峰面积之比为22111的结构简式为______(不考虑立体异构)

a.能与FeCl3溶液发生显色反应;b.能发生银镜反应;c.苯环上有2个取代基。

(6)为原料,结合上述合成线路中的相关信息,设计合成的路线(用流程图表示,无机试剂任选)

“32”模拟练()

一、选择题

1. 下列实验操作正确的是()

A. 提纯乙烷B. 制备氨气

C. 制备无水Na2SO3D. 制乙酸乙酯

2. XYZW为短周期的四种元素,原子序数依次增大。XYW三种元素分别位于不同短周期的不同主族。ZW对应的简单离子核外电子排布相同,XYZW元素可形成一种新型漂白剂(结构如图)。下列说法不正确的是()

A. 电负性:Z>Y>X>W

B. YZ杂化方式相同

C. 1 mol 该化合物的阴离子中含有2 mol 配位键

D. 漂白剂中Z的化合价为-1、-2

3. 甲酸燃料电池工作原理如下图所示,已知该半透膜只允许K通过。下列有关说法错误的是()

A. 物质AH2SO4

B. K经过半透膜自a极向b极迁移

C. a极电极反应式为HCOO2e2OH===HCO3H2O

D. Fe3可以看作是该反应的催化剂,可以循环利用

二、填空题

4. 配制100 mL 0.05 mol/L Fe2(SO4)3溶液。

(1)该实验需要用到的玻璃仪器有:烧杯、量筒、玻璃棒、__________________________________

(2)为了防止Fe2(SO4)3水解,在配置过程中可以加入少量__________

.探究Fe2(SO4)3Cu的反应。

[原理预测] (3)请写出Fe2(SO4)3Cu的反应的离子方程式:______________________________________________

[开展实验某实验小组在进行Fe2(SO4)3Cu的反应时观察到了异常现象,决定对其进行进一步的探究。

实验

[提出问题] (4)实验前,小组同学预测步骤2后溶液不会变为红色,原因是______________________________________________________________________

查阅文献:.CuSCN为难溶于水的白色固体;

.SCN被称为拟卤素离子,性质与卤素离子相似。

[提出猜想经过实验测定白色固体为CuSCN,查阅资料后小组同学猜测CuSCN的生成有如下两种可能。

猜测1Cu2KSCN发生了氧化还原反应。

猜测2:亚铁离子将其还原发生反应:Cu2Fe2===CuFe3CuSCN===CuSCN

(5)猜测1的离子方程式为______________________________________________________________

[设计实验

实验序号

对比实验及试剂

实验步骤

实验现象

实验

A试管:

2 mL 0.1 mol/L FeSO4溶液

加入1 mL 0.4 mol/L KSCN溶液

开始时溶液的上方变为红色,一段时间后红色向下蔓延,最后充满整支试管

B试管:

2 mL 0.1 mol/L CuSO4溶液

加入1 mL 0.4 mol/L KSCN溶液

溶液变成绿色

实验

C试管:

2 mL 0.1 mol/L FeSO4溶液

加入2 mL 0.1 mol/L CuSO4溶液

溶液变为淡蓝色

再加1 mL 0.4 mol/L KSCN溶液

溶液的上层变为红色,有白色沉淀产生,一段时间后整支试管溶液呈深红色

[得出结论] (6)实验中试管______(填字母)中的现象可以证实猜测1不成立。

(7)Fe3的氧化性本应强于Cu2,结合实验中的现象解释Cu2Fe2===CuFe3能正向发生的原因:______________________________________________________________________________________________________________________________________

5. 我国力争于2030年前做到碳达峰2060年前实现碳中和,因此CO2的综合利用是研究热点之一。

(1)CO2为原料可制取甲醇。已知:

. H2(g)CH3OH(l)的燃烧热ΔH分别为-285.8kJ/mol和-726.5kJ/mol

. CH3OH(l)CH3OH(g)ΔH=+38kJ/mol

. H2O(l)H2O(g)ΔH=+44kJ/mol

则反应CO2(g)3H2(g)CH3OH(g)H2O(g)ΔH______________kJ/mol

(2)利用CO2H2合成甲醇涉及的主要反应如下:

. CO2(g)3H2(g)CH3OH(g)H2O(g)ΔH1

. CO2(g)H2(g)CO(g)H2O(g)ΔH2=+41kJ/mol

一定条件下向某刚性容器中充入物质的量之比为13CO2H2发生上述反应,在不同催化剂(Cat1Cat2)下经相同反应时间,CO2转化率和甲醇的选择性[甲醇的选择性=n(CO)+n(CH3OH)n(CH3OH)×100%]随温度变化如图甲所示。

由图可知,催化效果Cat1______(“>”)Cat2

210270间,CH3OH的选择性随温度的升高而下降,可能原因为______________________________________________________________________________________________________________

某条件下,达到平衡时CO2的转化率为15%CH3OH的选择性为80%,则H2的平衡转化率为__________;反应的平衡常数Kp______(列出算式即可)

(3)利用制备的甲醇可以催化制取丙烯,过程中发生如下反应:3CH3OH(g)===C3H6(g)3H2O(g)。该反应的实验数据遵循Arhenius经验公式,如图乙中曲线a所示,已知Arthenius经验公式为Rlnk=-TEaC(Ea为活化能,假设受温度影响忽略不计,k为速率常数,RC为常数),则反应的活化能为________kJ/mol。当改变外界条件时,实验数据如图乙中的曲线b所示,则实验可能改变的外界条件是________________________;此经验公式说明对于某个基元反应,当升高相同温度时,其活化能越大,反应速率增大得________(越多越少)

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  1. CONNECT:[ UseTime:0.000606s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000818s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000330s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000249s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000459s ]
  6. SELECT * FROM `set` [ RunTime:0.000192s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000481s ]
  8. SELECT * FROM `article` WHERE `id` = 471518 LIMIT 1 [ RunTime:0.000457s ]
  9. UPDATE `article` SET `lasttime` = 1772601753 WHERE `id` = 471518 [ RunTime:0.015701s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000323s ]
  11. SELECT * FROM `article` WHERE `id` < 471518 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000515s ]
  12. SELECT * FROM `article` WHERE `id` > 471518 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000574s ]
  13. SELECT * FROM `article` WHERE `id` < 471518 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000582s ]
  14. SELECT * FROM `article` WHERE `id` < 471518 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000548s ]
  15. SELECT * FROM `article` WHERE `id` < 471518 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000582s ]
0.088573s