2022IB大考成绩报告出炉！IB全球均分、通过率下滑明显
不久前，IBO国际文凭组织（International Baccalaureate Organization，简称IBO）发布了2022年5月场次的全球IBDP & CP 大考及学校评估成绩的暂定数据简报（Provisional statistical bulletin），其中包含了考...
Edexcel A Level Chemistry:复习笔记5.1.1 Deducing Kp Expressions
Kp Expressions We have seen previously that equilibrium reactions can be quantified by reference to an equilibrium expression and equilibrium constant The equilibrium expression links the eq...
Edexcel A Level Chemistry:复习笔记4.2.4 Qualitative Analysis
Core Practical 7: Analysis of Inorganic and Organic Unknowns Test Tube Reactions Simple test tube reactions can be done to identify the following ions: Ammonium ions (NH4+) Halide ions (X-) ...
Edexcel A Level Chemistry:复习笔记4.2.3 Chlorination of 2-Methylpropan-2-ol
Core Practical 6: Chlorination of 2-Methylpropan-2-ol Synthesis of a haloalkane from an alcohol Measure 8 cm3 of 2-methylpropan-2-ol in a measuring cylinder Pour the 2-methylpropan-2-ol into...
Edexcel A Level Chemistry:复习笔记4.2.2 Ethanol Oxidation
Core Practical 5: Oxidation of Ethanol Oxidation of ethanol Primary alcohols can be oxidised to form aldehydes which can undergo further oxidation to form carboxylic acids When ethanol is ox...
Edexcel A Level Chemistry:复习笔记4.2.1 Hydrolysis of Halogenoalkanes
Core Practical 4: Investigating Halogenoalkane Hydrolysis Halogenoalkanes can be hydrolysed with an aqueous solution of sodium hydroxide (NaOH) or potassium hydroxide (KOH) This reaction is ...
Edexcel A Level Chemistry:复习笔记4.1.4 Determining Enthalpy Change of Reaction
Core Practical 8: Determining Enthalpy Change of Reaction Measuring enthalpy changes Calorimetry is a technique used to measure changes in enthalpy of chemical reactions A calorimeter can be...
Edexcel A Level Chemistry:复习笔记4.1.3 Determining Concentrations
Core Practical 3: Hydrochloric Acid Concentration Performing the Titration The key piece of equipment used in the titration is the burette Burettes are usually marked to a precision of 0.10 ...
Edexcel A Level Chemistry:复习笔记4.1.2 Standard Solutions
Core Practical 2: Preparing a Standard Solution Volumetric Analysis Volumetric analysis is a process that uses the volume and concentration of one chemical reactant (a volumetric solution) t...
