当前位置:首页>复习资料>【2026版化学高考步步高大二轮专题复习讲义浙江专用版一、化学基础知识

【2026版化学高考步步高大二轮专题复习讲义浙江专用版一、化学基础知识

  • 2026-03-29 03:00:15
【2026版化学高考步步高大二轮专题复习讲义浙江专用版一、化学基础知识

一、化学基础知识

(一)化学与STSE

关键词:化学物质物质转化物质的用途

要点提醒:

1.物质的分类(酸、碱、盐、酸性氧化物、碱性氧化物、氢化物、单质、化合物、纯净物、混合物)。

2.铝热反应(铝热剂如铝粉和Fe2O3;焊接钢轨;冶炼V、Cr、Mn等)。

3.合金(熔点低于成分金属,硬度大)材料。

4.无机非金属材料:硅酸盐材料或传统无机非金属材料(水泥;玻璃——普通玻璃的主要成分有SiO2、Na2SiO3、CaSiO3陶瓷);新型无机非金属材料(半导体材料Si可作芯片或太阳能电池,SiO2用来生产光导纤维,新型陶瓷如高温陶瓷氮化硅、碳化硅,碳纳米材料如碳纳米管、石墨烯等)。

5.蛋白质存在(蚕丝、毛发、毛皮、牛胰岛素等)、变性的条件和特点、盐析的条件和特点、鉴别。

6.天然高分子(油脂不属于高分子):淀粉、纤维素、蛋白质、天然橡胶;合成高分子:聚乙烯、聚氯乙烯(不能用作食品包装袋)、有机玻璃、合成纤维等。

7.烟花:焰色试验,物理变化,发射光谱,钠黄色、钾紫色。

8.氧化还原反应在生产和生活中的应用:金属的冶炼、钢铁的锈蚀、电化学、脱氧剂、燃烧、食物腐败等。

9.各种能源类型:新能源、可再生能源、一次能源、清洁能源。

10.碳中和:排放与消除CO2量相当,植树造林、节能减排。

易错辨析

(1)因为FeSO4溶液显酸性,所以可用作自来水厂的净水剂(  )

(2)因为SO2具有还原性,所以可用于葡萄酒的保存(  )

(3)苯酚能用于生活环境杀菌消毒(  )

(4)Na2SO3具有还原性,可用于处理自来水中残留的Cl2(  )

(5)实验时Cl2尾气可用饱和食盐水吸收(  )

(6)HNO3具有氧化性,可用于溶解单质银(  )

(7)人工合成淀粉技术的应用,有助于实现碳达峰碳中和(  )

(8)硫酸铜是重金属盐,可以使蛋白质变性,可用作游泳池的杀菌剂(  )

(9)由于硬铝密度小、强度高,所以可用作航空材料(  )

(10)高温下C与SiO2反应可制备高纯硅(  )

(11)Cl2和热的石灰乳反应可制备Ca(ClO)2为主要成分的漂粉精(  )

(12)食品包装袋中常放置硅胶、生石灰、还原铁粉等,其作用都是防止食品氧化变质(  )

(13)医用酒精:体积分数为75%的乙醇,使蛋白质变性,常用于消毒杀菌(  )

(14)福尔马林:甲醛的水溶液,使蛋白质变性,是良好的杀菌剂,常作为浸制标本的溶液,不可用于食品保鲜(  )

(15)蚕丝灼烧有烧焦羽毛的气味,可以区别蚕丝和合成纤维(  )

(16)聚氯乙烯有毒,不能用于食品包装袋(  )

(17)食用油反复加热会产生稠环芳香烃等有害物质,食用油不能反复加热(  )

(18)聚四氟乙烯具有抗酸、抗碱、抗各种有机溶剂的特点,用于厨具表面涂层(  )

(19)乙二醇用作内燃机抗冻剂(  )

答案 (1)× (2) (3) (4) (5)× (6) (7) (8) (9) (10)× (11)× (12)× (13) (14) (15) (16) (17) (18) (19)

(二)化学用语

要点提醒:

1.原子符号X,质子数、中子数的计算。

2.原子、离子、分子、基团电子式的书写与判断。

3.分子式(共价键形成的分子)、结构式、结构简式(顺反异构)、最简式(实验式)、键线式(碳原子的个数与名称)。

4.原子或离子结构示意图(离子最外层有2个或8个电子)。

5.基态(或激发态)原子、离子(价层或最外层)电子排布式或轨道表示式(遵循洪特规则;主要用于分析成对或未成对电子数、空轨道)。

6.同位素[原子,如H、(D)、(T);12C、14C等]、同素异形体(单质,如金刚石、石墨、C60;O2和O3)、同系物、同分异构体。

7.常见分子的VSEPR模型(H2O:四面体形、2个孤电子对;NH3:四面体形、1个孤电子对;AlCl3:平面三角形、无孤电子对),空间结构的确定。

8.电子云轮廓图(s球形、p哑铃形)。

9.球棍模型与空间填充模型(半径的大小是否正确)。

10.多元弱酸的电离要分步书写。

易错辨析

(1) K+的结构示意图:(  )

(2)中子数为8的碳原子:(  )

(3)K2S的电子式:(  )

(4)PH3的电子式为(  )

(5)H2O的形成过程:(  )

(6)乙烯的空间填充模型:(  )

(7) 基态硫离子的核外电子排布式:1s22s22p63s23p4(  )

(8)基态铜原子的价层电子轨道表示式:(  )

(9) NF3的空间结构:(平面三角形)(  )

(10)乙醚的结构简式:CH3OCH3(  )

(11) 2丁烯的键线式:(  )

(12) 异丁烷的结构简式:(  )

答案 (1)× (2) (3)× (4)× (5) (6)× (7)× (8) (9)× (10)× (11)× (12)×

(三)常用化学计量

要点提醒:

1.以物质的量为核心的化学计算

2.阿伏加德罗常数判断考前必读

通过网盘分享的文件:word讲义【更新联系:lymsummers】等2个文件

链接: https://pan.baidu.com/s/10SY5y2aMVnchrA2xx-JUuQ?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000717s ] mysql:host=127.0.0.1;port=3306;dbname=i_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000835s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000398s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000293s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000640s ]
  6. SELECT * FROM `set` [ RunTime:0.000306s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000779s ]
  8. SELECT * FROM `article` WHERE `id` = 462461 LIMIT 1 [ RunTime:0.000913s ]
  9. UPDATE `article` SET `lasttime` = 1774775077 WHERE `id` = 462461 [ RunTime:0.003110s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000251s ]
  11. SELECT * FROM `article` WHERE `id` < 462461 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000443s ]
  12. SELECT * FROM `article` WHERE `id` > 462461 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000357s ]
  13. SELECT * FROM `article` WHERE `id` < 462461 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001874s ]
  14. SELECT * FROM `article` WHERE `id` < 462461 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000876s ]
  15. SELECT * FROM `article` WHERE `id` < 462461 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005382s ]
0.105186s