2022年AP考试放榜，附25门AP科目5分率汇总！2023年AP考位预报名开启
2022年AP考试放榜 恭喜翰林学员收获78个科目5分 近两天我们为本年度翰林AP备考学员 （通过翰林报名AP考位并学习相应AP课程的学生） 每一门5分发放 888 元AP奖学金 虽然多个地区由于疫情原因取消了AP考试 翰林依旧...
Edexcel IGCSE Chemistry 复习笔记 2.7.9 Practical: Prepare Lead(II)Sulfate
Edexcel IGCSE Chemistry 复习笔记 2.7.9 Practical: Prepare Lead(II)Sulfate Practical: Prepare Lead(II)Sulfate Aim: To prepare a dry sample of lead(II) sulfate Diagram: The prepa...
Edexcel IGCSE Chemistry 复习笔记 2.7.8 Practical: Prepare Copper(II)Sulfate
Edexcel IGCSE Chemistry 复习笔记 2.7.8 Practical: Prepare Copper(II)Sulfate Practical: Prepare Copper(II)Sulfate Aim: To prepare a pure, dry sample of hydrated copper(II) sulfate crystals Materials...
2022北京各高中科技特长生招生盘点，科创赛事成为香饽饽！
2022年北京中考已经落下帷幕，全市参加中考的考生共10.09万人，同比去年参考人数增加25%！对很多考生而言，出分以后亚历山大。 但对于目光长远的家庭来说，他们比同龄人多一重入学的身份，那就是科技特长生。 以...
Edexcel IGCSE Chemistry 复习笔记 2.7.7 Prepare an Insoluble Salt
Edexcel IGCSE Chemistry 复习笔记 2.7.7 Prepare an Insoluble Salt Prepare an Insoluble Salt Insoluble salts can be prepared using a precipitation reaction The solid salt obtained is the preci...
Edexcel IGCSE Chemistry 复习笔记 2.7.6 Prepare a Soluble Salt II
Edexcel IGCSE Chemistry 复习笔记 2.7.6 Prepare a Soluble Salt II Prepare a Soluble Salt II Aim: To prepare a sample of a dry salt starting from an acid and an alkali Diagram: Diagram ...
Edexcel IGCSE Chemistry 复习笔记 2.7.5 Prepare a Soluble Salt
Edexcel IGCSE Chemistry 复习笔记 2.7.5 Prepare a Soluble Salt Prepare a Soluble Salt A soluble salt can be made from the reaction of an acid with an insoluble base During the preparation of ...
Edexcel IGCSE Chemistry 复习笔记 2.7.4 Bases
Edexcel IGCSE Chemistry 复习笔记 2.7.4 Bases Bases What makes a base act like a base? Bases are substances which can neutralise an acid, forming a salt and water The term base and alkali are not th...
Edexcel IGCSE Chemistry 复习笔记 2.7.3 Reactions of Acids
Edexcel IGCSE Chemistry 复习笔记 2.7.3 Reactions of Acids Reactions of Acids Reactions of acids with metals Only metals above hydrogen in the reactivity series will react with dilute acids T...
Edexcel IGCSE Chemistry 复习笔记 2.7.2 Acids, Bases & Protons
Edexcel IGCSE Chemistry 复习笔记 2.7.2 Acids, Bases & Protons Acids, Bases & Protons Proton transfer The earlier definition of an acid and a base can be extended In terms of proton t...
Edexcel IGCSE Chemistry 复习笔记 2.7.1 Solubility Rules
Edexcel IGCSE Chemistry 复习笔记 2.7.1 Solubility Rules Solubility Rules Ionic compounds are generally soluble in water compared to covalent substances, but there are exceptions A knowledge ...
Edexcel IGCSE Chemistry 复习笔记 2.6.3 Acid-Alkali Titrations
Edexcel IGCSE Chemistry 复习笔记 2.6.3 Acid-Alkali Titrations Acid-Alkali Titrations Titrations are a method of analysing the concentration of solutions Acid-base titrations are one of the m...
