第753页-翰林严选-翰林国际教育

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翰林严选

美国TOP大学文书喜好盘点，藤校青睐怎样的申请文书呢？

2022-09-15

Personal Statement （个人陈述）作为申请中的一项重要材料，一定程度上决定了招生官对你的“第一印象”。 PS的发挥空间非常灵活，更加注重个人的个性化展示。有的学校还会出特定的话题，要求申请人围绕特定的话题...

Edexcel A Level Chemistry:复习笔记5.1.1 Deducing Kp Expressions

2022-09-15

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

2022-09-15

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

2022-09-15

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

2022-09-15

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

2022-09-15

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

2022-09-15

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

2022-09-15

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

2022-09-15

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...

Edexcel A Level Chemistry:复习笔记4.1.1 Molar Volume of a Gas

2022-09-15

Core Practical 1: Measuring the Molar Volume of a Gas Measuring gas volumes The volume of gas produced in a reaction can be measured by collecting the gas with a gas syringe or by the displa...