CIE A Level Chemistry复习笔记1.7.10 pH Scale
The pH Scale The pH scale is a numerical scale that shows how acidic or alkaline a solution is The values on the pH scale go from 1-14 (extremely acidic substances have values of below 1) All acids...
CIE A Level Chemistry复习笔记1.7.9 Acid & Base Dissociation
Acid & Base Dissociation Strong acids A strong acid is an acid that dissociates almost completely in aqueous solutions HCl (hydrochloric acid), HNO3 (nitric acid) and H2SO4 (sulfuric acid) The ...
CIE A Level Chemistry复习笔记1.7.8 Brønsted–Lowry Theory
Brønsted–Lowry Theory The Brønsted-Lowry Theory defines acids and bases in terms of proton transfer between chemical compounds A Brønsted-Lowry acid is a species that gives away a proton (H+) A Brø...
CIE A Level Chemistry复习笔记1.7.7 Acids & Bases
Common Acids An acid is a substance that neutralises a base forming a salt and water: 2HCl(aq) + CaO(s) ⇌ CaCl2(aq) + H2O(l) acid salt Acids react with bases to form ...
CIE A Level Chemistry复习笔记1.7.6 Industrial Processes
Haber & Contact Processes Equilibrium reactions are involved in some stages of large-scale production of certain chemicals An understanding of equilibrium and Le Chatelier’s principle is theref...
CIE A Level Chemistry复习笔记1.7.5 Changes Affecting the Equilibrium Constant
Changes that Affect the Equilibrium Constant Changes in concentration If all other conditions stay the same, the equilibrium constant Kc is not affected by any changes in concentration of the react...
CIE A Level Chemistry复习笔记1.7.4 Equilibrium Constant Calculations
Equilibrium Constant: Calculations Calculations involving Kc In the equilibrium expression each figure within a square bracket represents the concentration in mol dm-3 The units of Kc therefore dep...
CIE A Level Chemistry复习笔记1.7.3 Equilibrium Constant
Equilibrium Constant: Concentrations Equilibrium expression & constant The equilibrium expression is an expression that links the equilibrium constant, Kc, to the concentrations of reactants an...
CIE A Level Chemistry复习笔记1.7.2 Le Chaterlier's Principle
Le Chatelier's Principle Position of the equilibrium The position of the equilibrium refers to the relative amounts of products and reactants in an equilibrium mixture. When the position of equilib...
2022 年马歇尔经济论文竞赛题目分析
2022 年马歇尔经济论文学术活动题目分析，同学们也可以感受一下这项比赛的难度，评估一下你是不是对参赛有兴趣。2022年马歇尔经济论文写作学术活动主题已经公布了，根据主题的简要说明，拟好自己的题目，或使用...
CIE A Level Chemistry复习笔记1.7.1 Chemical Equilibria
Reversible Reactions & Dynamic Equilibrium Reversible reaction Some reactions go to completion where the reactants are used up to form the products and the reaction stops when all of the reacta...
CIE A Level Chemistry复习笔记1.6.3 Oxidising & Reducing Agents
Oxidising & Reducing Agents Oxidising agent An oxidising agent is a substance that oxidises another atom or ion by causing it to lose electrons An oxidising agent itself gets reduced – gains el...
