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2026人教版高中化学教材(全)5本必修选修 | 免费分享

  • 2026-04-01 03:08:23
2026人教版高中化学教材(全)5本必修选修 | 免费分享

人教版·化学选择性必修3有机化学基础.pdf

人教版·化学选择性必修2物质结构与性质.pdf

人教版·化学选择性必修1化学反应原理.pdf

人教版化学必修第二册.pdf

人教版化学必修第一册.pdf

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人教版高中化学教材(5本全) 」,点击链接或复制整段内容,打开「夸克APP」即可获取。 链接:
https://pan.quark.cn/s/8346cfaedcda
走进微观世界,一切开始有趣。老师总说“分子原子离子”,像念经。你想象一个橘子,整个橘子好比一种物质,掰开的一瓣瓣果肉就像分子,再挖出的一粒粒籽就是原子。有的籽带电(离子),有的不带电(原子)。这里必考:原子结构。画个图,中心是原子核(质子和中子),外面电子绕圈跑。考题总问“决定元素种类的是什么?”是原子核里的质子数。氢为什么是氢?因为它原子核里永远只有一个质子。质子数变了,元素就变了。那“决定元素化学性质的是什么?”是最外层电子数。比如钠原子,最外层一个电子,它就想把这个电子送出去,所以活泼得吓人,遇水就炸;而氦气最外层满了(2个电子,稳定结构),它就懒洋洋的,几乎不跟别人玩。计算题常考:已知某原子质子数11,中子数12,电子数10,问这是原子还是离子?质子11,电子10,带正电了,这是阳离子(钠离子Na⁺)。答案就这么直接。
背元素周期表?别傻背。看清规律:横着看(周期),电子层数相同;竖着看(族),最外层电子数相同,所以化学性质相似。前20号元素,像顺口溜一样每天念两遍:“氢氦锂铍硼,碳氮氧氟氖…”考题让你推陌生元素性质,就给它在周期表的位置。比如告诉你某元素在第三周期、第17族(ⅦA),立刻反应:电子层数3,最外层电子7个,疯狂想抢1个电子达标,典型非金属,很可能是氯。这种推理题,掌握了规律就是送分。
说到这,得提化学式。写化学式就像搭积木,规则就一条:让化合物整体不带电。比如氯化钠,钠离子Na⁺带1个正电,氯离子Cl⁻带1个负电,一正一负刚好抵消,所以NaCl。氧化镁呢?镁离子Mg²⁺带2个正电,氧离子O²⁻带2个负电,电荷平衡,MgO。但遇到硫酸铝就麻烦点:铝离子Al³⁺,硫酸根离子SO₄²⁻,怎么配?让正负总电荷相等:找最小公倍数。+3和-2的最小公倍数是6,所以需要2个Al³⁺(总+6)和3个SO₄²⁻(总-6),化学式Al₂(SO₄)³。看起来复杂,其实就考一个电荷平衡。我当年在草稿纸上画了无数个离子小人,让它们手拉手电荷归零,后来这方法帮了半个班的同学。
化学方程式,是考试的重头戏。书写四步:一写反应物生成物(靠记忆和推断),二配原子个数(用最小公倍数法),三注条件(加热△、点燃等),四标沉淀↑或气体↓。配平是老大难。比如铁丝在氧气中燃烧:Fe + O₂ → Fe₃O₄。左边氧原子2个,右边4个,最小公倍数4,所以O₂前配2,Fe₃O₄里有3个铁,所以Fe前配3:3Fe + 2O₂ → Fe₃O₄。再检查,左边铁3氧4,右边也是,搞定。计算题往往从这里出:已知3克镁在氧气中完全燃烧生成氧化镁,求氧化镁质量。先写方程:2Mg + O₂ → 2MgO。算相对分子质量:Mg是24,MgO是40。设氧化镁质量x,列比例:48/80 = 3/x,解出x=5克。这分就像白捡的,只要你方程别写错。
溶液那块,记住三句话:能溶解的叫溶质,溶解它的叫溶剂,混合一起叫溶液。溶解度曲线是高频考点。图上一条线往上爬,表示温度升高溶解度增大,比如硝酸钾;线平躺的,温度影响小,比如食盐(氯化钠);还有往下掉的(罕见),温度升高溶解度反而减,比如氢氧化钙。考题给条曲线,问“30℃时硝酸钾溶解度是多少?”就去横坐标30℃对应纵坐标数值,可能是45克/100克水。问“从饱和溶液里结晶怎么办?”溶解度随温度升高而大的,用降温结晶;随温度变化小的,用蒸发溶剂结晶。实验题常考配制一定质量分数溶液,步骤:计算、称量、量取、溶解。误差分析:如果配完了浓度偏小,可能是称溶质时撒了,或者量水时仰视读数(实际水多了)。这些细节,丢一分都可惜。
酸碱盐,听名字就头大?其实它就一张网。酸(H⁺打头,像HCl、H₂SO₄),碱(OH⁻结尾,像NaOH、Ca(OH)₂),盐(金属离子+酸根离子,像NaCl、CaCO₃)。必考复分解反应:两种化合物交换成分,生成沉淀、气体或水之一,反应才发生。比如盐酸和氢氧化钠:HCl + NaOH → NaCl + H₂O,生成水,所以反应。碳酸钙和盐酸:CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂↑,生成气体(二氧化碳),所以反应。但 NaCl 和 KNO₃ 交换成分,还是 NaCl 和 KNO₃,没沉淀没气体没水,不反应。这张网里,酸碱指示剂是哨兵:紫色石蕊遇酸变红,遇碱变蓝;无色酚酞遇酸不变,遇碱变红。中和反应应用题:胃酸过多吃氢氧化铝,为什么?因为 Al(OH)₃ + 3HCl → AlCl₃ + 3H₂O,中和掉了多余酸。
金属活动性顺序表,背熟:“钾钙钠镁铝,锌铁锡铅氢,铜汞银铂金”。越往前越活泼。考法:判断能否反应。比如铜和硫酸锌溶液?铜在锌后,不活泼,抢不过锌的位置,不反应。铁和硫酸铜溶液?铁在铜前,能把铜离子挤出来,铁表面出现红色固体,溶液蓝变浅绿:Fe + CuSO₄ → FeSO₄ + Cu。计算题:把10克铁片放入硫酸铜溶液,一会儿取出烘干称重11克,求生成铜多少克?用差量法:Fe ~ Cu 质量差,56克铁换出64克铜,增重8克。现在实际增重1克,列比例 8/1 = 64/x,x=8克。这方法快得惊人。
实验操作,安全第一。闻气体用手扇,加热试管口不对人,酒精灯用灯帽盖灭。必考实验:氧气制取。高锰酸钾加热:2KMnO₄ → K₂MnO₄ + MnO₂ + O₂↑,装置用铁架台、试管、集气瓶。步骤查装定点收离熄。二氧化碳制取:大理石和稀盐酸 CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂↑,用向上排空气法(因为二氧化碳密度比空气大)。检验氧气:带火星木条复燃;检验二氧化碳:通入澄清石灰水变浑浊。这些描述题,语言要精准:“复燃”不是“燃烧”,“变浑浊”不是“有沉淀”。
化学与生活,简单但易错。三大化石燃料:煤、石油、天然气(主要成分甲烷CH₄)。燃烧充分条件:足够空气、足够温度。灭火原理:隔绝空气、降温到着火点以下、移除可燃物。考题:油锅着火怎么办?盖锅盖,隔绝空气。不能用水,因为油浮水面,反而扩散。化肥:氮肥壮叶,磷肥壮果,钾肥壮茎。缺氮植株矮小叶片发黄,缺磷果实小,缺钾易倒伏。环境保护:酸雨(pH<5.6,由二氧化硫、氮氧化物引起),温室效应(主要二氧化碳,还有甲烷等),白色污染(塑料)。选择题常混在一起考,看清题干问什么。
计算题综合,无非质量守恒。参加反应各物质质量总和等于生成物质量总和。密闭容器中,反应前后质量差可能是气体跑掉或进来。比如石灰石烧制生石灰:CaCO₃ → CaO + CO₂↑,烧完质量减轻,因为二氧化碳飞了。求纯度:(纯净物质量/样品质量)×100%。样品20克,加热后剩余固体15克,减轻5克是二氧化碳质量,根据方程可求纯净碳酸钙质量,再算纯度。一步步拆,别跳步。
这些知识点,像散落的珍珠,我用一根线给你串起来了。但光看不够,得动手。我当年有个破本子,专门记错题,不是抄题,而是写“为什么错”:是概念混淆?计算粗心?还是规律没掌握?每周翻一次,同样的坑绝不跳两次。化学不需要题海,需要把每个反应像故事一样记住:谁和谁见面,发生了什么变化,生成了什么新朋友。想象钠跳进水杯,嘶嘶作响转圈跑,生成氢氧化钠和氢气;想象二氧化碳通入紫色石蕊试液,变红因为生成了碳酸。当你看到题目,脑子里不是文字,是一幅幅动画,答案自己就蹦出来了。
考试前一天,别再啃新题。把你的笔记、错题本、那些口诀和图表过一遍。睡个好觉。走进考场时,相信这些知识已经长在你心里。答题时,填空题看清化学式大小写(Co钴,CO一氧化碳);选择题用排除法;计算题单位别忘。遇到难题,深呼吸,回想我们走过的这些步骤:它考的是变化分类?微观结构?还是方程式计算?总能找到突破口。
最后,送你一句门捷列夫的话:“生活便是寻求新知识。”化学不仅是试卷上的分数,它是你理解这个世界如何运作的一扇窗。从原子碰撞到星辰诞生,背后都有化学的影子。现在,你手里有了地图,勇敢走进去吧。每一个搞懂的化学反应,都会在未来某个时刻,照亮你前进的路。祝你期末满分,前程似锦,在更广阔的天地里,继续探索万物变化的奥秘。

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  1. CONNECT:[ UseTime:0.000518s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001112s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000443s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000283s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000857s ]
  6. SELECT * FROM `set` [ RunTime:0.000247s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000826s ]
  8. SELECT * FROM `article` WHERE `id` = 466221 LIMIT 1 [ RunTime:0.000574s ]
  9. UPDATE `article` SET `lasttime` = 1775341755 WHERE `id` = 466221 [ RunTime:0.003683s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000321s ]
  11. SELECT * FROM `article` WHERE `id` < 466221 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000647s ]
  12. SELECT * FROM `article` WHERE `id` > 466221 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000670s ]
  13. SELECT * FROM `article` WHERE `id` < 466221 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001080s ]
  14. SELECT * FROM `article` WHERE `id` < 466221 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001259s ]
  15. SELECT * FROM `article` WHERE `id` < 466221 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001469s ]
0.082769s