公开提问帖——化学篇——开张迎客！
应小黑的嘱托，蒙小黑的关照，当选为化学课代表::z5 ::z5化学部分可以说比物理难，比生物简单。。在SAT2中可以说是中国人选科（数理化）中最难的了。。所以希望大家在我和各位板油的帮助下能攻下这座不大不小的堡垒。。我们的目标是：70道题不错一道！！（800分算什么）::z2 ::z2 %c)Rj|5g
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废话不多说，下面说一下提问回答方式。。
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提问尽量以中英双语为基础，这样使回答的同学（毕竟都是中国人）便于回答，也便于总结化学词汇以及化学知识。。)UJC.@[
当然如果是中文或者英文的提问的话，也是可以接受的。。但是可能会造成一些不便，所以在此建议大家用中英双语。。
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[color=red][b]注意[/b][/color]@d_V9xITs\
1、提问发出以后[b]不要跟贴催促回答[/b]，因为人都是需要思考过程的，催促回答者一律删楼处理 f` {7}r(zE GAG
2、[b]禁止回跟内容无关的各类形式的帖子[/b]（如感谢，牛X等）F7X/^:VN
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最后，希望各位taishaer支持我的工作，店长在此感激不尽！！::81 ::81 ::81
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[b][size=3][color=red]化学考试知识点安排[/color][/size][/b] i(W8{k4~ y _/E?
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[b][color=green][list][*][size=2][color=black][b]Atomic and Molecular Structure (25%)[/b][/color][/size][/list][indent][color=black][size=2]including: Atomic Theory and Structure; Nuclear Reactions; Chemical Bonding and Molecular Structure.[/size]
[/color][/indent][list][*][size=2][color=black][b]States of Matter (15%)[/b][/color][/size][/list][indent][color=black][size=2]including: Kinetic Molecular Theory of Gases; Solution Chemistry[/size]3n$^?/E8]
[/color][/indent][list][*][size=2][color=black][b]Reaction Types (14%)[/b][/color][/size][/list][indent][color=black][size=2]including: Acid-Base Reaction; Oxidation-Reduction Reaction[/size]E W A4?*r|3V.Z:_
[/color][/indent][list][*][size=2][color=black][b]Stoichiometry (12%)[/b][/color][/size][/list][indent][color=black][size=2]including: Mole concept and Avogadro's Number; Empirical and Molecular Formulas; Percentage Composition; Stoichiometric Calculations; Limiting Reagents[/size]*j Sd.m7FX
[/color][/indent][list][*][size=2][color=black][b]Equilibrium and Reaction Rates (7%)[/b][/color][/size][/list][indent][color=black][size=2]including: Mass Action Expressions; Ionic Equilibria; Le Chatelier's Principle; Reaction Rates[/size]
[/color][/indent][list][*][size=2][color=black][b]Thermodynamics (6%)[/b][/color][/size][/list][indent][color=black][size=2]including: Energy Changes in Chemical Reactions; Randomness; Spontaneity[/size]'qX6hD&IWo
[/color][/indent][list][*][size=2][color=black][b]Descriptive Chemistry (13%)[/b][/color][/size][/list][indent][color=black][size=2]including: Physical and Chemical Properties of the Elements and Familiar Compounds; Periodic Properties[/size]N L8m)m5]#h
[/color][/indent][list][*][size=2][color=black][b]Laboratory (8%)[/b][/color][/size][/list][indent][size=2][color=black]including: Equipment; Procedures; Observations; Calculations and Interpretation of Results; Safety.[/color][/size][/indent][/color][/b][b][color=green][/quote][/color][/b]
[size=3][color=royalblue][b]目录[/b][/color][/size] s_9Ou)KY$GP0U;kr'i
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[size=3][b]大家问大家答[/b][/size] O&O6RO1q#M T r8s2tI
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整理过后的答案会贴在一楼'E u,g0Pt`*Ry
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[[i] 本帖最后由 夜X 于 2007-4-4 18:15 编辑 [/i]] SATII CHEM的范围是多大?
包括哪些内容? ^8I;N2J @;Ra!@
THX
回复 #2 acola 的帖子
先占楼，这个问题我稍微查一下然后我会放在1楼。。一般就是高中课改以后的所有内容。。但是占的比例会不同。。 用什么参考书比较好？网上有什么资料可以参考？
回复 #4 123zxc4rfv 的帖子
终于有人问问题了。。。虽然不是学术性的。。。9Q X2v0a)vF2Y9h S!Z}.d^,\$A)d
一般选择巴朗，难度据称应该比考试难些。。一般一本书就足够了，网上的资料可以参见其它帖子。。emule那个分享上有。。 那个Bronsted-Lowry Acid和Arrhenius Acid是啥米意思啊??
BRØNSTED-LOWRY THEORY
A more satisfactory theory was proposed in 1923 by the Danish chemist Johannes Brønsted and independently by Thomas Lowry, a British chemist. Their theory states that an acid is a proton (hydrogen ion, H+) donor and a base a proton acceptor. Although the acid must still contain hydrogen, the Brønsted-Lowry theory does not require an aqueous medium. For example, liquid ammonia, which acts as a base in aqueous solution, can act as an acid in the absence of water by transferring a proton to a base and forming the amide anion (negative ion) NH2-: NH3 + base⇄NH2- + base + H+$Co ~VJ^;Y4sfThe Brønsted-Lowry definition of acids and bases also explains why a strong acid displaces a weak acid from its compounds (and likewise for strong and weak bases). Here acid-base reactions are viewed as a competition for protons. In terms of a general chemical equation, the reaction of Acid (1) with Base (2) Acid (1) + Base (2)⇄Acid (2) + Base (1)results in the transfer of a proton from Acid (1) to Base (2). In losing the proton, Acid (1) becomes its conjugate base, Base (1). In gaining a proton, Base (2) becomes its conjugate acid, Acid (2). The equilibrium represented by the equation above may be displaced either to the left or to the right, and the actual reaction will take place in the direction that produces the weaker acid-base pair. For example, hydrogen chloride (HCl) is a strong acid in water because it readily transfers a proton to water to form a hydronium ion: HCl + H2O⇄H3O+ + Cl-The equilibrium lies mostly to the right because the conjugate base of HCl, Cl-, is a weak base, and H3O+, the conjugate acid of H2O, is a weak acid.
In contrast, hydrogen fluoride, HF, is a weak acid in water because it does not readily transfer a proton to water: HF + H2O⇄H3O+ + F-This equilibrium lies mostly to the left because H2O is a weaker base than F-, and because HF is a weaker acid (in water) than H3O+. The Brønsted-Lowry theory also explains why water can be amphoteric, that is, why it can serve as either an acid or a base. Water serves as a base in the presence of an acid that is stronger than water (such as HCl), in other words, an acid that has a greater tendency to dissociate than does water: HCl + H2O⇄H3O+ + Cl-Water can also serve as an acid in the presence of a base that is stronger than water (such as ammonia): NH3 + H2O⇄NH4+ + OH-
回复 #6 pengyuqing 的帖子
Arrhenius Acid偶也不知道了。。。回复 #6 pengyuqing 的帖子
Arrhenius Theory of Acids & Bases: n:a[b#|A'f%mbAn acid produces Hydrogen ion(H+) when it dissolves in water.
A base produces hydroxide ion(OH-) when it dissolves in wate.$W]${v {*M1veu~ s
According to Arrhenius Theory, neutralization is defined as the reaction which the H+ ions reacts with the OH- ions to produce a water molecule, and thus annihilating each other.
Arrhenius Theory has a narrower perspective compared to Bronsted-Lowry Theory regarding to the definition of an acid and a base.
回复 #9 violetfishzx 的帖子
Arrhenius Theory a:bn+KJ:o:fABd G应该是原始的酸碱学说了。。。 化学能错几个题目啊？ 有人可以拿中文讲一下 b#hb1Cv Sg U|
Spontaneity,Entropy, & free Energy这块的内容么？
我已经掉进去爬不出来了+ 顺便讲讲那个BT的反应Energy的图吧
什么activation energy什么heat of the reaction什么potential energy之类的
在图上完全不会对应阿 = = [quote]原帖由 [i]dongll11[/i] 于 2007-5-3 13:30 发表 [url=http://bbs.taisha.org/redirect.php?goto=findpost&pid=8606431&ptid=802444][img]http://bbs.taisha.org/images/common/back.gif[/img][/url]"xU WY&J3G9g/[
顺便讲讲那个BT的反应Energy的图吧
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什么activation energy什么heat of the reaction什么potential energy之类的 Wt6R/a.B3Kr
在图上完全不会对应阿 = = [/quote]
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activation energy: the threshold energy that must be overcome to produce a chemical reaction
heat of the reaction & potential energy 地球人应该都能理解。u4V5QVz8Lv
然后图的话。
[[i] 本帖最后由 汤汤汤汤～ 于 2007-5-10 09:55 编辑 [/i]] [quote]原帖由 [i]汤汤汤汤～[/i] 于 2007-5-3 13:37 发表 [url=http://bbs.taisha.org/redirect.php?goto=findpost&pid=8606479&ptid=802444][img]http://bbs.taisha.org/images/common/back.gif[/img][/url]
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你那个图像我基本明白。明天上课偷懒的时候给你做出来表格+ [/quote]
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谢谢呀~merci.oRW'r;R"L\+h%S:P
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明天就考了
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回复 #11 cancercrab 的帖子
6个。。好像是。。 请问sat2的内容有没有涉及ap chem的?? b/Msy(X3}r读honor chemi够不够? 6月2日的化学，最辛苦的一门...
回复 #19 stevenshaw 的帖子
加油！！ 问个关于IonizationEnergy的问题 m6O-HL'AG6L[attach]420489[/attach]
答案是什么
答案是什么，紫的还是绿的 assume都指的是1st IE, 选项E是对的。 哪位在国内上高中的板油能帮忙总结一下SAT2化学里考到但国内高中课程里没有的东西。我这几天准备传资料了，但不想传一些没用的东西。谢谢。 拿着巴朗的那本书 对照着无机化学上册看 只看最简单的有机很简单 无机的内容大概和全国联赛的内容差不多吧 当然难度低很多 我复习的时候是用kaplan的书学，princeton review的书作题，感觉挺好的。没怎么读过Barron，因为听说里面学的东西有点太偏了。我觉得Kaplan讲的还是不错的。::16 恩。。能不能问不是sat2的化学呢？|7V-p,u9S,@i
今天ap化学刚开课，教材还米有，老师让我们自己research一下dimensional analysis，我查了些资料，可是还是不能很理解到底是怎么回事，而且感觉从我查到的东西看这个和物理更有关联，有人能解答下，dimensional analysis在化学里是怎么回事么？~ 麻烦咯，谢谢~::z3 ap chem的能在这里问么？~~ 刚来第一个问题：SAT II里有没有国内高中学的有机啊？我最头痛了。。。::91 我是在国内上过高一来的，算是省重点高中的前50名吧。现在在读11年级，没有选化学，不知道我的程度是不是可以考SAT2化学？不算英语的难度 好伟大哦...我12月考chem...怕怕呢.!
问一道化学题 麻烦大家了啊啊~~~
::z5 barron2007上的the burning of carbon with excess O2 to form CO2 will go to completion$mK ~4o;yU `7Q
BECAUSE p dV|&c;{ZV [-h_C
when a reaction results in the release of a gas that is allowed to escape, the reaction will fo to completion 感觉解释不对吧。。。。碳和少量的氧气反应不是CO么 还有请问这是哪一页的题 [size=7][color=red]excess[/color][/size] 读题读错了,是过剩的氧气和c反应 学长 你读你读题要注意定语阿