CIE A Level Chemistry复习笔记1.8.2 Rate of Reaction
Rate of Reaction: Concentration & Pressure Concentration The more concentrated a solution is, the greater the number of particles in a given volume of solvent An increase in concentration cause...
CIE A Level Chemistry复习笔记1.8.1 Collision Theory
Rate of Reaction: Collision Theory Reaction rate The rate of a reaction is the speed at which a chemical reaction takes place and has units mol dm-3 s-1 The rate of a reaction can be calculated by:...
CIE A Level Chemistry复习笔记1.7.13 Indicators used in Titration
Indicators Indicators are substances that change colour when they are added to acidic or alkaline solutions When choosing the appropriate indicator, the pH of the equivalence point is very importan...
CIE A Level Chemistry复习笔记1.7.12 pH Titration Curves
pH Titration Curves What are pH titration curves Titration is a technique used in neutralisation reactions between acids and alkalis to determine the concentration of the unknown solution It involv...
CIE A Level Chemistry复习笔记1.7.11 Strength of Acids & Bases
Strong & Weak Acids & Bases Strong and weak acids can be distinguished from each other by their: pH value (using a pH meter or universal indicator) Electrical conductivity Reactivity pH An ...
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 ...
